Explorations in 2013 Find out about scheduled missions to our solar...
Explorations in 2011 Find out about scheduled missions to our solar...
Neptune's Triton Triton is a world like no other. Geysers of gas...
Saturn's Moons Saturn has 62 known moons.
Jupiter's Moons Jupiter has 62 known moons. The four Galilean...
Facts and Figures The biggest, farthest and fastest in the...
Remnants from the Beginning Whenever you build a new house, you always have...
Realm of the Giants The region beyond the asteroid belt is the realm...
Exploring Our Own Back Yard The four planets closest to the Sun -- Mercury,...
Mars' Moons Two small moons, Phobos and Deimos, orbit Mars....
Orion, the Hunter Orion is one of the most beautiful of all...
Gemini, the Twins Gemini is easy to find as it glides high...
Canis Major, the Great Dog Canis Major loyally follows its mythical master...
Auriga, the Charioteer Auriga, the celestial charioteer, has neither...
Taurus, the Bull Taurus, the bull, is marked by a V-shaped...
Perseus, the Hero Perseus, the hero, arcs high overhead in fall...
Pegasus, the Flying Horse Pegasus is a large pattern of stars marked by a...
Cassiopeia, the Queen The mythological queen Cassiopeia floats...
Capricornus, the Sea-Goat Capricornus, the sea goat, bounds low across the...
Scorpius, the Scorpion Three bright stars form the "head" of Scorpius,...
Sagittarius, the Archer Sagittarius, the archer, slides low across the...
Lyra, the Harp It's easy to find Lyra, the harp, by first...
Cygnus, the Swan The brightest stars of Cygnus form a cross, so...
Aquila, the Eagle Aquila glides on outstretched wings through the...
Ursa Major, the Great Bear Ursa Major — the great bear — is always above...
Leo, the Lion The zodiacal constellation Leo, the lion, is one...
Boötes, the Herdsman The brightest stars of Boötes form a cone shape...
Energy: Tools of the Trade From radio waves to visible light to X-rays,...
Dark Energy The universe seems to be pervaded with a...
Dark Matter In the universe, what you see is certainly not...
Age of the Universe Most astronomers agree that the observable...
The Whole Universe The universe began with a fiery Big Bang. Matter...
Galaxies Fade Eventually, the stars of the Milky Way will burn...
The Local Group The Milky Way galaxy is part of a larger cosmic...
The Milky Way The Milky Way consists of a bulge of stars in...
Galaxy Formation One of the greatest challenges facing...
Types of Galaxies Galaxies can be classified in several ways. The...
Galaxies: Cities of Stars Stars beyond counting populate the universe....
Finding Earth-Like Planets Astronomers have discovered far more planets...
Signs of Life Astronomy may be within a decade or so of...
Exoplanets As the list of known planets beyond the solar...
Black Holes A black hole is invisible, but astronomers can...
Exploding Stars Some types of stars expire with titanic...
Colorful Dwarfs Most of the stars in our Milky Way galaxy are...
Star Color and Energy Stars come in a variety of sizes and colors, but...
Cosmic Beacons The stars that 'twinkle, twinkle' in the night...
Meteorites To the people of L'Aigle, France, it must have...
Asteroids At the dawn of the 19th century, a group of...
Comets With the possible exception of Saturn's rings,...
Pluto After 76 years of glory, the small ball of rock...
Equipment Tips The only instrument that most beginners need is...
Pick a Good Viewing Spot Your own back yard will do just fine. Then, as...
Neptune Neptune might be called the mathematicians'...
Uranus To the eye alone, Uranus is a dull planet. It...
Saturn The planet Saturn is a delicate giant. Although...
Jupiter Weather systems on Earth blow themselves out in...
Mars Mars inspires speculation like no other world in...
Earth We know our world as an abode for life. Earth is...
Venus Cloud-covered Venus is the second planet from...
Mercury Tiny, cratered Mercury is the closest planet to...
Explorations of Minor Bodies When Comet Halley last passed through the inner...
Explorations of Outer Planets Pioneer 10 and 11 blazed the trail to the outer...
Explorations of the Inner Solar System The Soviet Union's Luna 3 solved an ancient...
Our Star, the Sun By human standards, the Sun is eternal. It rises...
Explorations in 2014 Find out about scheduled missions to our solar...
Explorations in 2012 Find out about scheduled missions to our solar...
Virgo Virgo is the second-largest constellation -- so...
Aquarius Thanks to its position in the zodiac, not to...
Cancer, the Crab Although it is one of the constellations of the...
Libra, the Scales Libra represents a balance scale. The name may...
Pisces, the Fish In the lore of the sky, spring is associated...
Aries, the Ram Aries, the ram, is a faint pattern marked by...
The Solar System: Home Sweet Home A middle-aged star, planets large and small,...
Explorations in 2010 Find out about scheduled missions to our solar...

Featured Images

The Andromeda galaxy, M31
Old News Saturday, December 20, 2014
Cassini close-up of Saturn's clouds
Impressions of a Planet Thursday, December 18, 2014
Earliest sunsets in December
Early Sunsets Monday, December 15, 2014
Possible origin of the Ocean of Storms
Cracks in the Moon Thursday, December 11, 2014
Curiosity rover view of rock layers inside Gale Crater on Mars
Ancient Lakebed Tuesday, December 9, 2014
Superflare on one of the stars of DG Canum Venaticorum
Tiny Star, Big Outburst Wednesday, December 3, 2014
Hubble Space Telescope view of Tadpole Galaxy
Galactic Tadpole Thursday, November 27, 2014
Artist's concept of Epsilon Aurigae
Playing Frisbee Sunday, November 23, 2014
Double Dribble Thursday, November 20, 2014
COBE view of the cosmic microwave background
Afterglow Tuesday, November 18, 2014
Sunlight glints off a hydrocarbon lake on Titan, the largest moon of Saturn
World of Lakes Tuesday, November 11, 2014
Cassini view of a crescent Titan, largest moon of Saturn
Hazy Skies Sunday, November 9, 2014
View of a newly forming planetary system around the young star HL Tauri
Planet Tracks Thursday, November 6, 2014
Messenger view of the surface of Mercury
Getting Closer Thursday, October 30, 2014
Postcard of the historic Elgin Watch Company Observatory in Illinois
Star Time Saturday, October 25, 2014
Artist's concept of Comet Siding Spring approaching Mars
Martian Encounter Thursday, October 16, 2014
Jupiter's radiation belts
Jovian Shields Wednesday, October 15, 2014
October 7 view of Rosetta spacecraft and its target comet
Neighbors Tuesday, October 14, 2014
Elephant Trunk Nebulan
Elephant's Trunk Sunday, October 12, 2014
Hubble Space Telescope view of Uranus
Tilted Giant Monday, October 6, 2014
Possible image of a moon being born in Saturn's rings
New Moon Rising? Saturday, September 27, 2014
India's Mars Orbiter Mission
On Target Again Wednesday, September 24, 2014
Artist's concept of MAVEN orbiting MARS
On Target Saturday, September 20, 2014
Through the Glow Tuesday, September 16, 2014
Hubble image of star cluster M15
Old Family Thursday, September 11, 2014
September 9, 2014, view of Curiosity rover's surroundings on Mars
Going Strong Tuesday, September 9, 2014
The Moon occults Dabih, a star in Capricornus
Celestial Cover-Up Friday, September 5, 2014
View of Saturn's rings from Cassini
Clearing the Gaps Sunday, August 31, 2014
Cat's Eye Nebula from Hubble Space Telescope
Colorful Demise Friday, August 29, 2014
NGC 1398, a spiral galaxy in the constellation Fornax
Strangely Familiar Saturday, August 23, 2014
Voyager 1 view of Jupiter's Great Red Spot
Long-Lasting Storm Monday, August 18, 2014
Hubble Space Telescope view of Jupiter, Ganymede
Layer-Cake Moon Friday, August 15, 2014
Jetting Across the Universe Tuesday, August 12, 2014
August 6, 2014, view of Comet Churyumov-Gerasimenko by Rosetta
Getting Closer Thursday, August 7, 2014
August 3, 2014, image of Comet Churyumov-Gerasimenko from Rosetta
Arrival Wednesday, August 6, 2014
Giant impact craters on Saturn's moons Mimas and Tethys
Survivors Monday, August 4, 2014
Ranger 7 images of the Moon, July 31, 1964
Success at Last Thursday, July 31, 2014
Artist's concept of hot gas funneling toward black hole at center of Milky Way
Dark Center Tuesday, July 29, 2014
A view of the busy Milky Way
Busy Galaxy Thursday, July 24, 2014
Diagram comparing sizes of Sun, Aldebaran
Giant Eye Monday, July 21, 2014
Artist's concept of comet impact on Jupiter
Strike One! Wednesday, July 16, 2014
Magellanic clouds above the ALMA radio telescope array
Cloudy Neighbors Monday, July 14, 2014
False-color image of M27, the Dumbbell Nebula
Last Gasp Saturday, July 12, 2014
Artist's concept of Solar Orbiter
Feeling the Heat Friday, July 4, 2014
Europa orbiter mission concept
Fresh Idea Thursday, July 3, 2014
Fading Away Sunday, June 29, 2014
Infrared view of Serpens South star cluster and nebula
Unmasking Hidden Stars Tuesday, June 24, 2014
Hubble Space Telescope view of Eta Carinae
Future Fireworks Monday, June 16, 2014
Three solar flares in early June 2014
Solar Fireworks Thursday, June 12, 2014
Cassini spacecraft passes Titan
A Decade at Saturn Tuesday, June 10, 2014
Combined visible, X-ray image of M51, the whirlpool galaxy
Colorful Whirlpool Wednesday, June 4, 2014
M44, the Beehive Cluster
Vanishing Beehive Monday, June 2, 2014
Venus, Mercury, and the earthshine-illuminated crescent Moon
Lighting the Shadows Friday, May 30, 2014
NGC 3590
Young and Future Stars Thursday, May 22, 2014
Hubble views of Jupiter's Great Red Spot
Shrinking Storm Thursday, May 15, 2014
Simulation of the early universe
Tangled Web Saturday, May 10, 2014
Otto Struve, first director of McDonald Observatory
First Director Thursday, May 8, 2014
Construction of McDonald Observatory's 82-inch telescope, ca. 1934
Celebrating Tuesday, May 6, 2014
Participants in the McDonald Observatory dedication, May 5, 1939
Getting Started Monday, May 5, 2014
Artist's concept of water vapor around Ceres; HST image of Ceres
Watery Dwarf Friday, May 2, 2014
Diagram showing the layouts of several exoplanet systems
Going Farther Wednesday, April 30, 2014
Artist's concept of a range of recently discovered exoplanets
Planet Hunting Monday, April 28, 2014
Views from the 1964 World's Fair
Space Fair Tuesday, April 22, 2014
HST image of thousands of galaxies
Galaxies Galore Thursday, April 17, 2014
Cassini image of a possible satellite growing in the outer regions of Saturn's r
Giving Birth? Tuesday, April 15, 2014
Black-widow pulsar
Doomed Mate Thursday, April 10, 2014
Artist's concept of early morning fog, clouds, and frost on Mars
Morning Fog Tuesday, April 8, 2014
Artist's concept of a solar sail
Sailing Along Thursday, April 3, 2014
WISE view of the Vela Nebula in Cygnus
Glowing Civilizations? Tuesday, April 1, 2014
Mariner 10 at Mercury
First Encounter Saturday, March 29, 2014
Venus Express movie showing south polar vortex
Double Vortex Thursday, March 27, 2014
The Milky Way glows above the Nevada desert
Dig Site Monday, March 24, 2014
Lunar Reconnaissance Orbiter view on lunar north polar regions
Top o' the Moon Wednesday, March 19, 2014
The Condor galaxy
Night of the Condor Saturday, March 15, 2014
A rare yellow hypergiant star in Centaurus
Jolly Yellow Giant Thursday, March 13, 2014
Artist's concept of a double sunset on exoplanet Kepler 16
Double Sunset Wednesday, March 5, 2014
Artist's concept of exoplanet system KOI-961, discovered by Kepler spacecraft
Worlds Galore Monday, March 3, 2014
Space-based infrared view of the Rosette Nebula
Ruffled Rose Friday, February 28, 2014
NGC 2264, a stellar nursery in Monoceros
Star Factory Wednesday, February 26, 2014
Downhill Racer Saturday, February 22, 2014
Diagram of Orion, the hunter
Orion's Belt Sunday, February 16, 2014
Fresh Martian impact crater seen by an orbiting spacecraft in late 2013
Fresh Impact Friday, February 7, 2014
A discharge of energy from the Z Machine at Sandia National Laboratories
Zapped! Monday, February 3, 2014
Peek-a-Boo Friday, January 31, 2014
Close-up view of the California Nebula in infrared light.
California Nebula Saturday, January 25, 2014
Close-up Hubble Space Telescope view of the Orion Nebula
Beautiful Birthplace Thursday, January 23, 2014
Artist's concept of Rosetta contacting Earth
Back to Work Monday, January 20, 2014
Artist's concept of black hole binary star system in the galaxy M101
Brilliant Darkness Thursday, January 16, 2014
Hubble Space Telescope view of M83 galaxy
Glowing Pinwheel Friday, January 10, 2014
Artist's concept of weather on a brown dwarf
Hot Rain Wednesday, January 8, 2014
A giant asteroid slams into Earth, leading to global extinctions
Impact! Monday, January 6, 2014
Artist's concept of a Mars Exploration Rover landing on Mars in 2004
Follow the Bouncing Rover Saturday, January 4, 2014
An early view of the primary mirror of McDonald Observatory's first telescope
Seeing the Light Tuesday, December 31, 2013
Three views of Comet Kohoutek
Comet Flop Thursday, December 26, 2013
Gold may have been created in the mergers of neutron stars
Golden Mergers Monday, December 23, 2013
RS Puppis, a supergiant star seen by Hubble Space Telescope
Dusty Skies Wednesday, December 18, 2013
China's Yutu rover on the Moon in an artist's concept
Lunar Returns Saturday, December 14, 2013
Superman's back story may have been inspired by an exploding star
Exploding Stars Saturday, December 14, 2013
Annie Jump Cannon
Astronomical Pioneer Tuesday, December 10, 2013
Female "computers" at Harvard College Observatory
Data Processing Center Monday, December 9, 2013
Space station view of Comet ISON and other celestial objects
Doomed Comet Wednesday, December 4, 2013
A Cassini view of the hexagonal cloud pattern surround Saturn's south pole
Planetary Cyclops Sunday, December 1, 2013
View of Comets ISON and Encke from a Sun-watching spacecraft
Sizzling Comets Wednesday, November 27, 2013
Launch of MAVEN spacecraft to Mars
On Its Way Monday, November 18, 2013
Almost Ready Monday, November 18, 2013
Artist's concept of MAVEN Mars orbiter
Mars Maven Sunday, November 17, 2013
The life and times of William Herschel
Stellar Musician Thursday, November 14, 2013
Telescopes at the south pole
Antarctic Adventures Wednesday, November 13, 2013
Telescopic view of M33, the Triangulum Galaxy
Pirouetting Octopus Sunday, November 10, 2013
Technicians replace equipment for HETDEX at McDonald Observatory
On (and Off) Track Monday, November 4, 2013
Artist's concept of extrasolar planet Kepler 78b, an Earth-sized world
Hot Rock Thursday, October 31, 2013
The Planck space telescope and its view of the cosmic microwave background
Going Dark Thursday, October 24, 2013
Hubble Space Telescope view of Comet ISON in October 2013
Getting Closer Friday, October 18, 2013
Hubble Space Telescope images of the Fomalhaut star system
Giant Planet of Mystery Tuesday, October 15, 2013
Rio Tinto, a river in Spain, is a Mars analog
Red River Wednesday, October 9, 2013
Magellan view of the giant Sapas Mons volcano on Venus
Venusian Vulcanism Monday, October 7, 2013
Hubble Space Telescope view of planet Uranus
Blue-Green Giant Tuesday, October 1, 2013
The Cat's Paw Nebula in submillimeter and near-infrared light
Star Maker Friday, September 27, 2013
Dumbbell Nebula, M27
Grand Finale Tuesday, September 24, 2013
Galileo enters Jupiter's atmosphere
Fiery Farewell Saturday, September 21, 2013
Lightning behind space shuttle Discovery
Just Whistle Thursday, September 19, 2013
The Great Square of Pegasus
Double Duty Thursday, September 12, 2013
LADEE launch, September 6, 2013
Moon Bound Saturday, September 7, 2013
Composite Galileo image of Jupiter's volcanic moon Io
Jovian Adventure Friday, August 30, 2013
Artist's concept of Spitzer Space Telescope
Heat Seeker Friday, August 23, 2013
Saturnian Heat Rays Wednesday, August 21, 2013
The star Gamma Cas blows away gas from a nearby nebula
Star Blaster Sunday, August 18, 2013
Artist's concept of planet HAT-P7b
Hot Spot Friday, August 16, 2013
Cassini view of the cracked crust of Saturn's moon Dione
Cracked Up Monday, August 12, 2013
Hubble image of a galaxy cluster and the deduced location of its dark matter
Dark Universe Monday, August 5, 2013
Eastern dawn sky, early August 2013
Morning Jam Friday, August 2, 2013
One of the first images from IRIS, a new Sun-watching satellite
First Sunlight Wednesday, July 31, 2013
Space-faring spider Arabella spins her first web in orbit, 1973
Spiders in Space Monday, July 29, 2013
Diagram shows Neptune and some of its moons, including one discovered in 2013
Second-Look Moon Monday, July 22, 2013
Cassini monitors Saturn's magnetic field
Radio Story Tuesday, July 16, 2013
Artist's concept of a blue exoplanet
Blue-Hot Planet Saturday, July 13, 2013
View of the 30 Doradus star cluster and the massive binary system R144
Megastars Tuesday, July 9, 2013
Visible light (left) and infrared view of the dark molecular cloud Barnard 68
Looking into the Darkness Sunday, July 7, 2013
Hubble Space Telescope view of Comet ISON, May 2013
Closing In Tuesday, July 2, 2013
Ultraviolet view of spiral galaxy NGC 6744 from the GALEX spacecraft
End of the Line Saturday, June 29, 2013
The Standard Model
Building Blocks Thursday, June 27, 2013
Alpha Magnetic Spectrometer aboard the International Space Station
Magnetic Personality Wednesday, June 26, 2013
Sunset from the International Space Station
Eyes on High Monday, June 24, 2013
Clouds above the south pole of Titan
Titanic Vortex Wednesday, June 19, 2013
MESSENGER view of crater Degas on Mercury
Painting a Planet Monday, June 17, 2013
Dusty Vega system
Dust Trap Friday, June 14, 2013
Kasei Valles, an ancient flood channel on Mars
Ancient Flood Monday, June 10, 2013
Starbirth region on the edge of the Milky Way galaxy
Starbirth Thursday, June 6, 2013
Images of solar telescopes around the world
Fanciful Eyes Monday, June 3, 2013
Hubble Space Telescope image of M101
Stellar Pinwheel Friday, May 31, 2013
Planetary conjunction, May 2013
Evening Traffic Jam Saturday, May 25, 2013
Ligeia Mare, one of the largest lakes on Titan, the largest moon of Saturn
Storms Ahead? Wednesday, May 22, 2013
Combined visual and millimeter-wave view of Orion Nebula, M42
Cold Fire Thursday, May 16, 2013
Skylab in orbit
First Space Station Tuesday, May 14, 2013
The powerful quasar SDSS J1106
Phenomenal Cosmic Power Friday, May 10, 2013
Hubble Space Telescope, May 2009
Recalibrating Monday, May 6, 2013
Cassini view of Saturn's north pole
Eye of the Storm Thursday, May 2, 2013
Pyramid of the Old Kingdom pharaoh Khafre and the Sphinx
Inside Job Tuesday, April 30, 2013
Hubble Space Telescope image of Comet ISON, April 2013
Closing In Wednesday, April 24, 2013
Artist's depiction of planet orbiting Alpha Centauri B
Close Neighbor Sunday, April 21, 2013
Hubble view of Coma Cluster of galaxies
Crowning Glory Friday, April 19, 2013
The Antennae galaxies
Getting Together Tuesday, April 16, 2013
GRAIL map of lunar surface gravity
Lunar Lumpiness Sunday, April 14, 2013
Infrared view of Betelgeuse
Messy Star Friday, April 12, 2013
Supercomputer simulations of Earth's magnetic field
Twist and Flip Monday, April 8, 2013
Lunar Orbiter view of Aristarchus crater
Bright Crater Thursday, March 28, 2013
X-ray view of a gamma-ray burst
Zapping Earth Tuesday, March 26, 2013
Curiosity rover view of Mount Sharp, March 2013
Sharp Destination Tuesday, March 19, 2013
Artist's concept of a neutron star's crust cracking
Cracking Up Friday, March 22, 2013
Comet C/2011 L4 Panstarrs in the western evening sky in March
Sneaky Comet Sunday, March 10, 2013
Cassini views Saturn's magnetic field
Solar Sculptor Friday, March 1, 2013
A black hole is created in the Large Hadron Collider, then quickly evaporates
Making a Black Hole Tuesday, February 26, 2013
Self-portrait of Curiosity rover on Mars, February 2013
Self-Portrait Monday, February 18, 2013
Keeping Track Saturday, February 16, 2013
Chart showing the path of asteroid 2012 DA14 relative to Earth.
Getting Close Thursday, February 14, 2013
Artist's concept of the Milky Way galaxy and its dark matter halo
Illuminating the Darkness Saturday, February 9, 2013
Artist's concept of a distant quasar
Fiery Galaxy Tuesday, February 5, 2013
The starry ceiling of Grand Central Terminal
Grand Sky Saturday, February 2, 2013
Close-up of the core of M31
M31 Blues Tuesday, January 29, 2013
Visible- and infrared-light views of Orion
Double Vision Friday, January 25, 2013
Star forming region in Orion
Hiding Places Wednesday, January 23, 2013
High-resolution view of Phobos, moon of Mars
Doomed Moon Sunday, January 13, 2013
Gemini Observatory view of outskirts of Orion Nebula
Knotheads Thursday, January 10, 2013
Combined optical and X-ray view of two possible black holes in the galaxy IC 342
On the Job Tuesday, January 8, 2013
Hubble Space Telescope view of globular cluster M2
Stars Galore Sunday, January 6, 2013
Comet McNaught, 2007
Bright Interlopers Wednesday, January 2, 2013
Soyuz spacecraft approaches space station with Moon in background
Ready for Arrival Monday, December 31, 2012
Cassini images of Dione, Rhea
Saturnian Two-Fer Thursday, December 27, 2012
Van Allen Probes and Earth's Van Allen radiation belts
Dangerous Exposure Thursday, December 20, 2012
Artist's concept of the Sun's structure
Powerhouse Monday, December 17, 2012
Gravitational map of the Moon compiled by the GRAIL mission
Lunar Attraction Saturday, December 15, 2012
Artist's concept of Mariner 2 flying past Venus, December 14, 1962
First Encounter Thursday, December 13, 2012
Apollo 17 astronaut Gene Cernan drives his lunar rover
End of the Road Monday, December 10, 2012
Hubble image of an edge-on galaxy, ESO 318-13
All that Glitters Tuesday, December 4, 2012
Curiosity view of Rocknest on Mars
Rocky Home Thursday, November 29, 2012
Orion, Jupiter, and other sights in late November
Orion Rising Monday, November 26, 2012
Cassini view of a crescent Titan
Enigmatic Moon Monday, November 19, 2012
Multispectral view of giant star-forming regions at the center of the Milky Way
Molecule Factory Tuesday, November 13, 2012
South polar vortex on Saturn, seen by Cassini
Saturnian Vortex Sunday, November 11, 2012
HESS telescopes in Namibia, which study the gamma-ray universe
Extreme Telescope Thursday, November 8, 2012
Nighttime view of the southeastern U.S. from the International Space Station
Blue Night Monday, November 5, 2012
Voyager 1 view of Jupiter's cloudsk
Artistic Clouds Thursday, November 1, 2012
Infrared/ultraviolet view of Helix Nebula
Colorful Demise Tuesday, October 23, 2012
Orionid Meteor Shower
Orionid Meteors Saturday, October 20, 2012
Cassini view of Saturn, October 2012
Saturn Looms Large Thursday, October 18, 2012
Planetary nebula R Leporis
Stellar Twister Thursday, October 11, 2012
The nearby starburst galaxy IC 10
Active Neighbor Monday, October 8, 2012
The 'lucky' stars of Aquarius
'Lucky' Stars Saturday, October 6, 2012
Moon, Jupiter, and Taurus, October 4-5, 2012
Bull Rush Thursday, October 4, 2012
Venus-Regulus encounter in the pre-dawn sky, October 2-4, 2012
Morning Mashup Monday, October 1, 2012
Recent image from Mars rovers Curiosity and Opportunity
Mars Targets Saturday, September 29, 2012
Portion of Hubble Extreme Deep Field
Extreme Astronomy Tuesday, September 25, 2012
First-quarter Moon
Moonwatch Saturday, September 22, 2012
Infrared image of the star Fomalhaut (center) and surround debris ring
Messy Building Zone Tuesday, September 18, 2012
Andromeda and the Milky Way head for a galactic pile-up
Collision Course Wednesday, September 12, 2012
Hubble image of a pair of galaxies
Bright Companions Friday, September 7, 2012
Artist's concept of the Gamma Cephei star system
Stellar Geometry Tuesday, September 4, 2012
About one hour after sunset, late August and early September
Red Rivals Wednesday, August 29, 2012
Neil Armstrong aboard the lunar module Eagle, July 21, 1969
Leading the Way Sunday, August 26, 2012
View of the asteroid Vesta from the Dawn spacecraft
Ready for Departure Thursday, August 23, 2012
A Voyager spacecraft and the cover of a record of Earth sights and sounds
Words From Home Monday, August 20, 2012
Solar eclipse of August 19, 1887, from near Berlin
Fire in the Sky Saturday, August 18, 2012
Illustration depicts the contact binary system W Ursae Majoris
Two-for-One Offer Wednesday, August 15, 2012
Early view of the rim of Gale Crater
Inside the Wall Sunday, August 12, 2012
Mars Science Laboratory heatshield falls away
Martian Litter Friday, August 10, 2012
August 8, 2012, view of Mars from the Curiosity rover
Getting Acquainted Wednesday, August 8, 2012
Composite view of Curiosity rover landing and operating on Mars
Drop In, Stay Awhile Monday, August 6, 2012
Skycrane lowers Mars Science Laboratory to the Martian surface
Rube Goldberg Meets Mars Sunday, August 5, 2012
Artist's concept of Mars Science Laboratory approaching the Red Planet
Final Approach Friday, August 3, 2012
The Lagoon Nebula, M8, from the European Southern Observatory
Pink Lagoon Thursday, July 26, 2012
Current and future pole stars
Moving On Monday, July 23, 2012
Alexandria, Egypt, as seen from the International Space Station
City of Power Friday, July 20, 2012
False-color view of Comet Swift-Tuttle, 1992
Swift Comet Monday, July 16, 2012
Altair is one of the three planets of the Summer Triangle
Flying Eagle Thursday, July 12, 2012
H-R Diagram
Stellar Plot Saturday, July 7, 2012
Hubble Space Telescope view of M104, the Sombrero Galaxy
Galactic Hat Dance Monday, July 2, 2012
A flare on the surface of the star HD 189733 blasts away the atmosphere of an or
Zapped! Friday, June 29, 2012
Moon and Companions, June 2012
Moon and Company Monday, June 25, 2012
The remnants of two merged galaxies
Fast Exit Monday, June 18, 2012
Apollo 17 at the rim of Shorty Crater, December 1972
Back to the Moon(rocks) Monday, June 11, 2012
June 5, 2012, Venus transit from International Space Station
Seeing Spots Saturday, June 9, 2012
Infrared image of the Carina Nebula from space-based Herschel Observatory
Busy Nursery Wednesday, June 6, 2012
Diagram of Venus transit of June 5, 2012
Sun Spot Monday, June 4, 2012
Partial lunar eclipse of June 4, 2012
Lunar Nibble Saturday, June 2, 2012
Hubble Space Telescope view of galaxy ESO 243-49
Little Giant Tuesday, May 29, 2012
A long-exposure view of Earth and the stars from the International Space Station
Around and Around We Go Saturday, May 26, 2012
Hercules, the strongman, depicted as he rises in the eastern sky
The Strongman Tuesday, May 22, 2012
Illustration of annular eclipse of May 20, 2012
In the Zone Friday, May 18, 2012
Star Stream Tuesday, May 15, 2012
Saturn's moon Titan floats in front of the giant planet
Moon on a String Friday, May 11, 2012
Without Einstein's theories of relativity, GPS wouldn't work
Where Am I? Tuesday, May 8, 2012
Simulation of a supermassive black hole disrupting a star
Messy Meal Friday, May 4, 2012
Beams of light shine through the Egg Nebula
Stellar Headlights Tuesday, May 1, 2012
Combined X-ray, optical, and radio view of the galaxy Centaurus A
Busy Galaxy Sunday, April 29, 2012
Two views of Saturn's outermost ring
Wiggly Ring Thursday, April 26, 2012
An ultraviolet camera gazes skyward from the Moon during the Apollo 16 mission
Looking Up Monday, April 23, 2012
Apollo 16 lunar module, Orion, on the Moon's Plains of Descartes
Almost Home Saturday, April 21, 2012
Space shuttle Discovery flies above Washington, DC, April 17, 2012
Last Stop Thursday, April 19, 2012
Saturn's battered moon Tethys seen by the Cassini Spacecraft, April 14, 2012
Wrinkly Moon Tuesday, April 17, 2012
Saturn and its rings as seen by Cassini
Subtle Color Sunday, April 15, 2012
Victor Hess prepares to ascend in a balloon to study cosmic rays, 1912
Radiation Hunter Saturday, April 7, 2012
Artist's concept of the Kepler-35 system, with a giant planet orbiting two stars
Seeing Double Wednesday, April 4, 2012
Artist's concept of stars and a gas cloud near the Milky Way's central black hol
Snack Time Thursday, March 29, 2012
Water geysers from the south pole of Enceladus, a moon of Saturn
Leaking Moon Monday, March 26, 2012
Omega Centauri, the possible core of a defunct galaxy
Invader! Friday, March 23, 2012
Space-based infrared view of the Large Magellanic Cloud
Busy Neighbor Tuesday, March 20, 2012
Optical and X-ray image of the galaxy cluster Abell 383
Brilliant Darkness Friday, March 16, 2012
Hubble Space Telescope view of Cat's Eye Nebula, a planetary nebula
Blowing Bubbles Tuesday, March 13, 2012
Venus and Jupiter pass each other in the evening sky, March 10-14, 2012
Celestial Headlights Saturday, March 10, 2012
A powerful solar flare erupts on March 6, 2012
Stormy Skies Thursday, March 8, 2012
The Moon passes by Mars and the star pattern of Leo, March 2012
Doubly Brilliant Tuesday, March 6, 2012
Mars is at opposition in early March 2012, shining brightest for the year
Mighty Mars Saturday, March 3, 2012
Newborn stars in the Orion Nebula
Bright Babies Thursday, March 1, 2012
Voyager mission enhanced-color image of Jupiter's Great Red Spot
Planetary Impressionism Sunday, February 26, 2012
John Glenn enters his Mercury capsule (right), and launches on February 20, 1962
Up, Up, and Away! Monday, February 20, 2012
Orion, the hunter, including his faint shield
Shielding the Hunter Friday, February 17, 2012
The Carina Nebula, a massive stellar nursery
Star Factory Monday, February 13, 2012
Dark lunar features are named seas or oceans
Split Personality Thursday, February 9, 2012
New Heavyweight Champion Monday, February 6, 2012
Sirius B, the white-dwarf companion to Sirius, compared to the size of Earth
Stellar Afterlife Wednesday, February 1, 2012
A January 23, 2012 solar flare
Restless Sun Monday, January 30, 2012
Endeavour Crater, winter home of the Opportunity Mars rover
Winter Wonderland Thursday, January 26, 2012
Infrared view of the spiral galaxy IC 342
Tangled Galaxy Sunday, January 22, 2012
Earth's atmosphere distorts the Moon as seen from the International Space Statio
Squashed Moon Tuesday, January 17, 2012
Infrared view of starbirth in the vast nebula complex Cygnus X
Busy Nursery Friday, January 13, 2012
Artist's concept of a dark storm on the brown dwarf 2MASS 2139
Stormy Skies Wednesday, January 11, 2012
Artist's concept of the pulsar and planets in the system PSR B1257+12
Second-Chance Planets Sunday, January 8, 2012
M1, the Crab Nebula, in a Hubble Space Telescope image
Crab Nebula Friday, January 6, 2012
The Moon and Hyades, night of January 5, 2012
Staring at the Bull Thursday, January 5, 2012
Jupiter's Great Red Spot and the planet's four largest moons
An Eyeful of Moons Monday, January 2, 2012
Artist's concept of GRAIL spacecraft measuring the Moon's gravitational field
Lunar Arrival Friday, December 30, 2011
Saturn's moons Titan and Dione above Saturn, with Saturn's rings
Saturnian Traffic Jam Monday, December 26, 2011
View of Comet Lovejoy from the International Space Station
Christmas Comet Friday, December 23, 2011
Horsehead Nebula photographed through a McDonald Observatory telescope
3D Horsehead Tuesday, December 20, 2011
A comet plunges toward the Sun
Survivor: Comet Friday, December 16, 2011
Galactic Swirl Wednesday, December 14, 2011
Galileo spacecraft mosaic of Ganymede, largest moon of Jupiter
Two-Toned Moon Monday, December 5, 2011
Plumes of gas spew into space from the roiling surface of Betelgeuse, the bright
Stellar Timebomb Thursday, December 1, 2011
Phoenix and Grus in the southern sky, late November evening
Rare Birds Monday, November 28, 2011
Ultraviolet view of Venusian clouds from Venus Express orbiter
Cloudy Skies Saturday, November 26, 2011
Artist's concept of Curiosity rover on Mars
Ready to Roll Wednesday, November 23, 2011
Optical and radio image of the Carina Nebula, a vast stellar nursery
Birthplace of the Stars Thursday, November 17, 2011
The Saturn Nebula, NGC 7009, as seen by Hubble Space Telescope
Saturn Simulacrum Sunday, November 13, 2011
The Russian Phobos-Grunt Mars mission launches on November 8, 2011
Phobos Flop? Friday, November 11, 2011
The glow of the aurora from the International Space Station
Heavenly Lightshow Sunday, November 6, 2011
The moon Phobos floats above Mars
Martian Target Thursday, November 3, 2011
Galileo view of Gaspra, the first asteroid visited by a spacecraft
First Encounter Saturday, October 29, 2011
An artist's concept of the darkest planet yet discovered
Dark World Thursday, October 27, 2011
Cassini view of Saturn's moon Enceladus in front of the planet's rings
Saturnian Encounter Tuesday, October 25, 2011
Two globular clusters; a previously known one at right, and a new one in circle
Star City Wednesday, October 19, 2011
An aquanaut practices space exploration techniques underwater
Diving into the Future Monday, October 17, 2011
The giant volcano Pele erupts on Jupiter's moon Io
Fire Mountain Thursday, October 13, 2011
Craters fill an ancient river channel on Mars
Martian Rapids Monday, October 10, 2011
Radio image of the Antenna galaxies
Boundless Starbirth Wednesday, October 5, 2011
Artist's concept of a starship
To Boldly Go... Saturday, October 1, 2011
Stars and gas swirl around the black hole at the center of the Milky Way
Swirling Center Tuesday, September 27, 2011
IC 2944, a stellar nursery in the constellation Centaurus
Seeing Red Thursday, September 22, 2011
Artist's concept of global ocean on Jupiter's moon Europa
Water World Friday, September 16, 2011
A thick torus of dust encircles a quasar
Water Works Tuesday, September 13, 2011
2011 image of the Apollo 12 landing site, from Lunar Reconnaissance Orbiter
Still Standing Friday, September 9, 2011
Map of the Moon's gravitational field
Lunar Lumpiness Tuesday, September 6, 2011
Messenger view of Mercury's southern hemisphere
Hard-to-Study Planet Friday, September 2, 2011
Composite view of a giant storm on Saturn from the Cassini spacecraft
Stormy Skies Wednesday, August 31, 2011
The star cluster M7
Aging Family Sunday, August 28, 2011
NGC 4438 and NGC 4435, galaxies in Virgo
Beautiful Eyes Thursday, August 25, 2011
Voyager 2 view of the Adams Ring at Neptune
Pulverized Moon Monday, August 22, 2011
Yerkes Observatory in Wisconsin is home to the world's largest refractor
Still Going Thursday, August 18, 2011
The Necklace Nebula, the remains of a dying star in Sagittarius
Ring of Fire Monday, August 15, 2011
Panoramic view of Endeavour crater on Mars, imaged by the Opportunity rover
Final Destination Thursday, August 11, 2011
Possible rivulets of water flowing on Mars
Drippy Planet Monday, August 8, 2011
International Space Station viewed from space shuttle Atlantis, July 19, 2011
Last Look Wednesday, August 3, 2011
Rock varnish on a rock from the Atacama Desert
Bacteria Colony? Friday, July 29, 2011
Scientists are studying rocks in Chile to learn about possible life on Mars
Looking for Life Wednesday, July 27, 2011
Chile's Atacama Desert is an analog for studying conditions on Mars
Mars on Earth Tuesday, July 26, 2011
Moon, Mars, and Aldebaran, July 26-28, 2011
Seeing Orange Monday, July 25, 2011
Atlantis lands on July 21, 2011, ending the space shuttle program
That's All, Folks! Friday, July 22, 2011
Dawn's first view of Vesta after entering orbit, July 2011
Settling In Monday, July 18, 2011
Dawn spacecraft view of asteroid Vesta shortly before entering orbit
First Stop Friday, July 15, 2011
Space shuttle Atlantis approaches the International Space Station, July 2011
Final Approach Wednesday, July 13, 2011
Delta Lyrae and the Summer Triangle
Seeing Double Sunday, July 10, 2011
Atlantis launches on the final space shuttle mission, July 8, 2011
Last Call Friday, July 8, 2011
Cassini view of Iapetus, a moon of Saturn
Two-Toned Moon Thursday, July 7, 2011
Messenger view of the surface of Mercury, June 2011
Hello, Sunshine Saturday, July 2, 2011
Illustration showing the Great Comet of 1861
Great Comet Thursday, June 30, 2011
The path of asteroid 2011 MD as it passes Earth, June 2011
Close Call Saturday, June 25, 2011
Dust coats the spacesuit of Apollo 17 astronaut Gene Cernan
Dirty Moonwalker Wednesday, June 22, 2011
Phobos, one of the moons of Mars, passes by the planet Jupiter.
Out of Order Monday, June 20, 2011
NGC 3758, a system of two merging galaxies
Double Trouble Saturday, June 11, 2011
A solar eruption on June 7, 2011
Big Splash Tuesday, June 7, 2011
Venus's path across the Sun during the transit of 1761
Bright Passage Monday, June 6, 2011
Artist's concept of upgraded Hobby-Eberly Telescope
Facelift for Science Friday, June 3, 2011
Stars and cities streak past space shuttle Endeavour
Fast Flyer Wednesday, June 1, 2011
A painting by Andrew Wyeth depicts preparations for a Gemini launch in the 1960s
Ready for Liftoff Monday, May 30, 2011
X-ray view of the Carina Nebula, a stellar nursery 7,500 light-years from Earth
Star Factory Thursday, May 26, 2011
Alpha Magnetic Spectrometer-2 attached to the International Space Station
On Duty Monday, May 23, 2011
Artist's concept of a free-floating planet in the Milky Way galaxy
Free Agent Thursday, May 19, 2011
Space shutle Endeavour launches on its final mission, June 16, 2011
Final Endeavour Monday, May 16, 2011
Cassini view of geysers on Saturn's moon Enceladus squirting far into space
Faithful Geysers Friday, May 13, 2011
Primary mirror of the Hobby-Eberly Telescope, McDonald Observatory
A Big Bottle of Windex? Wednesday, May 11, 2011
M8, the Lagoon Nebula, is a vast stellar nurseary
Stellar Canvas Friday, May 6, 2011
Alan Shepard enters his capsule, then launches aboard Freedom 7, May 5, 1961
A-OK Flight Thursday, May 5, 2011
Lightning strikes near space shuttle Endeavour, April 28, 2011
Close Call Monday, May 2, 2011
Moon and planets in the dawn sky, April 30/May 1, 2011
Dawn Encounter Friday, April 29, 2011
Artist's concept of TW Hydra, a young star encircled by a disk of gas and dust
Messy Youngster Monday, April 25, 2011
Artist's concept of the planetary system Kepler 11
Close Family Friday, April 22, 2011
A view of NGC 3582, a large stellar nursery in Karina
Life and Death Tuesday, April 19, 2011
The Opportunity rover crosses the Martian plains toward Endeavour crater
Crater Crawling Saturday, April 16, 2011
Image of water distribution in northern hemisphere of Mars
Watery Mars Thursday, April 14, 2011
Launches of Vostok 1, STS-1 (space shuttle Columbia)
Double Date Tuesday, April 12, 2011
Streamers of dust partially obscure the "seven sisters," members of the Pleiades
Veiled Sisters Wednesday, April 6, 2011
Infrared view of planetary nebula NGC 4361 in Corvus
Cotton-Candy Star Sunday, April 3, 2011
MESSENGER's first color image of Mercury, March 29, 2011
First Glimpse Thursday, March 31, 2011
Storm clouds swirl through Saturn's atmosphere in an image from Cassini
Artistic Storm Monday, March 28, 2011
New stars and the raw materials for more stars in the stellar nursery NGC 6729
Star Maker Thursday, March 24, 2011
Earth and Moon from International Space Station
Blue Moon? Monday, March 21, 2011
Artist's concept of Messenger orbiting Mercury
Safe Arrival Friday, March 18, 2011
Mercury and Jupiter passing in the evening sky
Just Passing By Sunday, March 13, 2011
X-ray and radio image of galaxy M87
Close to the Monster Thursday, March 10, 2011
Irregular galaxy Henize 2-10, which appears to contain a supermassive black hole
Small But Powerful Tuesday, March 8, 2011
Giotto spacecraft view of Halley's Comet, March 1986
Halley's Armada Saturday, March 5, 2011
Sky view from space shuttle Discovery, February 2011
Nice View Wednesday, March 2, 2011
Space shuttle Discovery launch, February 24, 2011
Last Show Friday, February 25, 2011
M78, a reflection nebula in Orion
Beautiful Reflection Monday, February 21, 2011
Comet Tempel 1 as seen by the Stardust spacecraft, February 14, 2011
Close Cometary Encounter Thursday, February 17, 2011
Comet Tempel-1 from the Stardust spacecraft, February 14, 2011
Second Glance Tuesday, February 15, 2011
Newly forming planetary system around Beta Pictoris
Messy Star System Thursday, February 10, 2011
Ground and orbital views of Opportunity rover at Santa Maria crater
Looking In Tuesday, February 8, 2011
Apollo 14 commander Alan Shepard poses with the American flag on the Moon
Long Journey Sunday, February 6, 2011
Spiral galaxy NGC 3621 in the constellation Hydra
Galactic Sparkler Wednesday, February 2, 2011
Antares, brightest star of Scorpius, shines through the rings of Saturn
Peeking Giant Friday, January 28, 2011
False-color image of Orion Nebula from European Southern Observatory
Delicate Power Friday, January 21, 2011
Earth is in the middle of the Sun's habitable zone
In the Zone Tuesday, January 18, 2011
Reiner Gamma, a prominent lunar swirl in the Ocean of Storms
Lunar Swirl Wednesday, January 12, 2011
Hubble view of Hanny's Voorwerp and the galaxy IC 2497
In the Spotlight Tuesday, January 11, 2011
Infrared image of the Lagoon Nebula
Blue Lagoon Thursday, January 6, 2011
The Horsehead Nebula
Galloping Nebula Saturday, January 8, 2011
The Sun as seen from space
Close to the Sun Monday, January 3, 2011
Over the Rim Friday, December 31, 2010
Opportunity rover view of Santa Maria crater
Crater Climbing Thursday, December 30, 2010
The Opportunity rover casts it shadow on the rim of a Martian crater
Martian Robot Wednesday, December 29, 2010
Geysers on Enceladus
Fizzy Moon? Monday, December 27, 2010
Western sky a couple of hours after sunset in late December
Happy Holidays! Saturday, December 25, 2010
Eruption of gas from the surface of the Sun
Sun Power Wednesday, December 22, 2010
Total Lunar Eclipse of December 21, 2010
Disappearing Moon Monday, December 20, 2010
Shields like those of the USS Enterprise may protect real space travel
Shields Up! Friday, December 17, 2010
Visible and X-ray image of a supernova remnant in the Large Magellanic Cloud
Holiday Decoration Thursday, December 16, 2010
Geminid Meteors Monday, December 13, 2010
Enceladus passes in front of Saturn's rings
Saturnian Iceball Wednesday, December 8, 2010
Japanese spacecraft Akatsuki at Venus
Venusian Dawn Monday, December 6, 2010
Sun glints off a lake on Saturn's moon Titan
Sparkling Lake Tuesday, November 30, 2010
IC 2118, the Witch Head Nebula
Witch Head Nebula Friday, November 26, 2010
China Clipper Sails the Pacific Ocean
Night Over Water Monday, November 22, 2010
NGC 7252, aka the Atoms-for-Peace galaxies
Atomic Pile-up Saturday, November 20, 2010
Leonid Meteor Shower 2010
Seeing Sparks Tuesday, November 16, 2010
Lunokhod image of its tracks on the lunar surface
Found It! Monday, November 15, 2010
Voyager 1 view of Saturn, November 1980
Getting Acquainted Friday, November 12, 2010
Infrared image of CW Leonis, a giant star that is surrounded by soot
Steamy Star Tuesday, November 9, 2010
The California Nebula, in Perseus
Stately Nebula Saturday, November 6, 2010
Comet Hartley-2 from Deep Impact Spacecraft
Fowl Comet? Friday, November 5, 2010
Deep Impact view of Comet Hartley-2
Closing In Thursday, November 4, 2010
Ultraviolet image of the region around the Ghost of Jupiter Nebula
Astronomical Ghost Sunday, October 31, 2010
Six Spiral Galaxies from European Southern Observatory
Galaxies Galore Friday, October 29, 2010
Cassini image of Saturn's moon Mimas, October 2010
Scarface Monday, October 25, 2010
Comet Hartley-2 from McDonald Observatory
Jolly Green Comet Thursday, October 21, 2010
Hobby-Eberly Telescope at McDonald Observatory
Searching the Darkness Friday, October 15, 2010
Infrared view of Comet Hartley 2 from WISE
Heading for a Rendezvous Wednesday, October 6, 2010
Artist's concept of a protoplanetary disk with wide gaps
Planet Nursery Monday, October 4, 2010
Ground-based image of the galaxy cluster Abell 2151, in Hercules
Galaxies Galore Friday, October 1, 2010
False-color infrared view of Saturn and its aurora
Colorful Aurora Tuesday, September 28, 2010
Luna 16 diagram
To the Moon and Back Friday, September 24, 2010
The aftermath of an asteroid impact in the southern hemisphere of Jupiter
Giant Scar Monday, September 20, 2010
A multi-spectral view of a supernova remnant in the Small Magellanic Cloud
Life from Death Friday, September 17, 2010
MIT professor Dava Newman models a new type of space suit
Dressed for Success (in Space) Wednesday, September 15, 2010
Two planets and a star team up with the crescent Moon in the western evening sky
Moon and Companions Friday, September 10, 2010
NGC 4666, a starburst galaxy
Lively Galaxy Friday, September 3, 2010
Evaporating planet around the star HD209458
Puffy Planet Thursday, August 26, 2010
Cassini snapped views of Saturn's moons Enceladus and Tethys.
Two Moons Rising Monday, August 16, 2010
M87 black hole
Busy Black Hole Wednesday, August 11, 2010
Galactic Beauty Wednesday, August 11, 2010
Messier 27
Heavy Lifting Saturday, August 7, 2010
Rings and bubbles from a dying star
Jumping Through Hoops Thursday, August 5, 2010
Two moons of Saturn are shaped like flying saucers, as seen by Cassini.
Flying Saucers! Thursday, July 29, 2010
The largest lake in the southern hemisphere of Saturn's moon Titan.
Big (Foot) Lake Tuesday, July 27, 2010
This giant cluster of galaxies and hot gas provides evidence of dark matter.
Cosmic Bullets Tuesday, July 20, 2010
Hot young stars carve beautiful shapes in surrounding clouds of gas and dust.
Stellar Sculptors Thursday, July 15, 2010
A thick dust storm blows across Mars in this image from Mars orbit.
Dusty Skies Monday, July 12, 2010
A false-color image of Idunn Mons indicates that the Venusian volcano is still a
Still Going? Friday, July 9, 2010
The Milky Way galaxy and the afterglow of the Big Bang make up this all-sky imag
A Little of Everything Tuesday, July 6, 2010
Dione, one of the moons of Saturn, passes in front of the larger moon Titan.
Just Passing By Wednesday, June 30, 2010
Western Lineup Sunday, June 27, 2010
A hot, massive star 'exhales' a breath of oxygen in this recent image from WISE.
Breath of Life Tuesday, June 22, 2010
The sky glows orange in this artist's concept of the atmosphere of Venus.
Dusky Skies Tuesday, June 15, 2010
An ultraviolet view of the spiral galaxy M81 shows young, hot stars in blue and
Grand Galaxy Saturday, June 12, 2010
The Cassini spacecraft snapped this image of Saturn's moon Rhea from a distance
Close Moon Monday, June 7, 2010
Rings and Moons
Rings and Moons Friday, June 4, 2010
Big Blue Planet
Big Blue Planet Tuesday, June 1, 2010
The remains of a supernova explosion form complex loops and filaments in this co
Colorful Aftermath Thursday, May 27, 2010
Starbirth Factories
Starbirth Factories Monday, May 24, 2010
The next Mars rover, Curiosity, zaps a Martian rock with a small laser in this a
War of the Worlds? Wednesday, May 19, 2010
A fish-eye image shows a laser firing from the Gemini North telescope in Hawaii.
Zapping the Sky Monday, May 17, 2010
Peeking at a Planet Sunday, October 25, 2009

Radio Programs

Deep Vision Looking deep into the universe Saturday, December 20, 2014
More Moon and Saturn Taming some small moons of Saturn Friday, December 19, 2014
Moon and Saturn Swirling through the clouds of a giant planet Thursday, December 18, 2014
Distant Neighbors The Milky Way’s lonely outskirts Wednesday, December 17, 2014
Moon and Spica Eyeballing some changes in the sky Tuesday, December 16, 2014
Earliest Sunsets Stretching out the sunsets Monday, December 15, 2014
Cetus A sea monster fit for Hollywood Sunday, December 14, 2014
Mars at Perihelion Mars gets close to the Sun Saturday, December 13, 2014
Geminid Meteors Fireworks from the celestial twins Friday, December 12, 2014
Moon and Companions Cracking the surface of the Moon Thursday, December 11, 2014
Moon and Jupiter Measuring the solar system with a ruler Wednesday, December 10, 2014
Rising Dipper A brief disappearance for the Big Dipper Sunday, December 7, 2014
Disappearing Triangle A holdover from summer skies Saturday, December 6, 2014
Moon and Aldebaran A 20-parsec jaunt across the galaxy Friday, December 5, 2014
Smash-up! A smash-up in a distant star system Thursday, December 4, 2014
Superflares A big outburst from a tiny star Wednesday, December 3, 2014
Fast Day A planet that spins in a hurry Tuesday, December 2, 2014
Moon and Uranus The Moon takes aim at a faint giant Monday, December 1, 2014
Rara Avis II Dancing with the firebird Sunday, November 30, 2014
Rara Avis Rare birds in southern skies Saturday, November 29, 2014
Tadpole Galaxies The inside-out heads of tadpole galaxies Friday, November 28, 2014
Tadpole Galaxy A tadpole swims near the dragon Thursday, November 27, 2014
Galaxy Mergers When galaxies collide Wednesday, November 26, 2014
Moon and Mars Jet lag after a long trip Tuesday, November 25, 2014
Orion Returns The return of an astronomical beauty Monday, November 24, 2014
Epsilon Aurigae Playing Frisbee with a bright star Sunday, November 23, 2014
Wang Liang A bright warrior in the northern sky Saturday, November 22, 2014
More Edwin Hubble Discovering the expanding universe Friday, November 21, 2014
Edwin Hubble A memento of a college basketball star Thursday, November 20, 2014
Big Bang Starting a universe with a bang Wednesday, November 19, 2014
COBE Deciphering the static of the early universe Tuesday, November 18, 2014
Great Wall A wall of galaxies across the universe Monday, November 17, 2014
Leonid Meteors Ready for a “streaky” meteor shower Sunday, November 16, 2014
Moon and Companions Feeble companions for a bright star Friday, November 14, 2014
Moon and Jupiter Clouds of dust around a giant planet Thursday, November 13, 2014
Making Methane Too much methane on a big moon Wednesday, November 12, 2014
Changing Seasons Changing seasons on a cold world Tuesday, November 11, 2014
Cloudy Skies Cloudy skies on a cold moon Monday, November 10, 2014
Through the Haze Seeing through the haze on a cold moon Sunday, November 9, 2014
Moon and Betelgeuse The “messy” space around a giant star Saturday, November 8, 2014
Moon and Aldebaran Making carbon and oxygen in a star Friday, November 7, 2014
Brightest The brightest outbursts in the universe Thursday, November 6, 2014
Brighter A bright star gets even brighter Tuesday, November 4, 2014
Bright Deceptive lights in the dawn sky Monday, November 3, 2014
Daylight Saving Time Saving daylight to save energy Saturday, November 1, 2014
Halloween A dark and lonely night in the dome Friday, October 31, 2014
Morning Mercury Getting closer to a little planet Thursday, October 30, 2014
Local Bubble Clearing out interstellar space Wednesday, October 29, 2014
New Distance The Seven Sisters move farther away Tuesday, October 28, 2014
Moon and Mars The planet Mars runs in place Monday, October 27, 2014
More Capella Bright giants with a shared evolution Sunday, October 26, 2014
Capella Guiding the way to a horn of plenty Saturday, October 25, 2014
More Polaris A “hiccup” for the North Star Friday, October 24, 2014
Polaris Pacing off the distance to the North Star Thursday, October 23, 2014
Solar Eclipse Darkening the afternoon sky Wednesday, October 22, 2014
Star Time Setting your watch by the stars Tuesday, October 21, 2014
New Names Spicing up the names of distant worlds Monday, October 20, 2014
Orionid Meteors Discovering a meteor shower Sunday, October 19, 2014
Meteor Showers Meteor showers on two planets Saturday, October 18, 2014
Close to Mars II Hiding behind the Red Planet Friday, October 17, 2014
Close to Mars An icy relic takes aim at Mars Thursday, October 16, 2014
Moon and Jupiter Traveling to a deadly planet Wednesday, October 15, 2014
Sadr A case of stellar WYSIWYG Tuesday, October 14, 2014
Close to the End A Venus-watching spacecraft nears its end Monday, October 13, 2014
The Elephant’s Trunk An elephant’s trunk in the northern sky Sunday, October 12, 2014
Moon and Aldebaran Avoiding a celestial collision Saturday, October 11, 2014
Black Hole Reality The reality about black holes Friday, October 10, 2014
Event Horizon An astronomical point of no return Thursday, October 9, 2014
Three-Headed Monster A trio of giant black holes Wednesday, October 8, 2014
Lunar Eclipse A repeat performance for the Moon Tuesday, October 7, 2014
Uranus at Opposition Lining up a giant oddball Monday, October 6, 2014
Celestial Sea The Moon swims in the Celestial Sea Sunday, October 5, 2014
Maffei 1 A bright galaxy hides behind a veil of dust Saturday, October 4, 2014
Fomalhaut III Taking a look at a possible “dusty” planet Friday, October 3, 2014
Fomalhaut II Faint companions for a bright star Thursday, October 2, 2014
Fomalhaut Watching one of the “guardians of heaven” Wednesday, October 1, 2014
Distant Hub Looking into the past of our home galaxy Tuesday, September 30, 2014
Moon, Mars, and Antares Heating up the daytime sky Monday, September 29, 2014
Moon and Planets Profiling undiscovered moons Sunday, September 28, 2014
Moon and Saturn Building a new moon around Saturn Saturday, September 27, 2014
Daniel Kirkwood Explaining bands of nothing Friday, September 26, 2014
Mars and Antares Coloring in two bright pinpoints Thursday, September 25, 2014
Biggest of the Big The monsters of the Milky Way Tuesday, September 23, 2014
Autumnal Equinox One way to mark a change in seasons Monday, September 22, 2014
MAVEN Probing Mars’s escaping atmosphere Sunday, September 21, 2014
Moon and Regulus Keeping an old star looking young Saturday, September 20, 2014
Moon and Jupiter The heat of a twisted moon Friday, September 19, 2014
Moon and Companions The little dog leads the big dog Thursday, September 18, 2014
John Goodricke Solving the mystery of a demon star Wednesday, September 17, 2014
The Next Wave A new wave of explorers at Mars Tuesday, September 16, 2014
Supervolcanoes Supervolcanoes on the Red Planet Monday, September 15, 2014
Silver Arch A silver archway across the evening sky Sunday, September 14, 2014
Moon and Taurus Families of stars flank the Moon Saturday, September 13, 2014
EQ Pegasi A pair of juvenile stellar neighbors Friday, September 12, 2014
M15 A fading family of ancient stars Thursday, September 11, 2014
Enif The leading lights of Pegasus Wednesday, September 10, 2014
Great Square The above-average stars of the Great Square Tuesday, September 9, 2014
Harvest Moon The full Moon lights the way Monday, September 8, 2014
Rasalhague The head of the serpent bearer Sunday, September 7, 2014
Ophiuchus The 13th constellation of the zodiac Saturday, September 6, 2014
Dabih Covering up a passel of stars Friday, September 5, 2014
World War II, Part III Science and service in World War II Thursday, September 4, 2014
World War II, Part II European astronomy during the war Wednesday, September 3, 2014
World War II Heading toward World War II Tuesday, September 2, 2014
Paper Black Holes Laying the groundwork for black holes Monday, September 1, 2014
Moon and Planets Ringing out the weekend Sunday, August 31, 2014
Cat’s Eye Nebula The true nature of a glowing cat’s eye Friday, August 29, 2014
Alpha Lacertae A star with a bright profile Thursday, August 28, 2014
Neptune at Opposition Lining up a blue-green giant Wednesday, August 27, 2014
Moons of Neptune Moons come, moons go Tuesday, August 26, 2014
Voyager 2 at Neptune A first glance at a giant world Monday, August 25, 2014
Doomed Planets Doomed planets around a dying star Sunday, August 24, 2014
Planet Bonanza A plenitude of exoplanets Saturday, August 23, 2014
Moon and Planets A bright show in the dawn sky Friday, August 22, 2014
Mars and Saturn A new season for the Red Planet Thursday, August 21, 2014
Great Red Spot III The case of the disappearing red spot Wednesday, August 20, 2014
Great Red Spot II Getting the red out of Jupiter’s “eye” Tuesday, August 19, 2014
Great Red Spot Staring into the eye of Jupiter Monday, August 18, 2014
More Venus and Jupiter Aligning two celestial headlights Sunday, August 17, 2014
Planet Pairings Pairs of planets bracket the Sun Saturday, August 16, 2014
Venus and Jupiter A cold layer cake for a big moon Friday, August 15, 2014
Little Pictures Little star pictures in the summer sky Thursday, August 14, 2014
Anders Angstrom Scanning the “barcode” of the Sun Wednesday, August 13, 2014
Powerful Jets Powerful jets from massive black holes Tuesday, August 12, 2014
Construction Zone A busy construction zone around a star Monday, August 11, 2014
Perseid Meteors Looking for sparks through the moonlight Sunday, August 10, 2014
Sigma Scorpii Impressive stars near the scorpion’s heart Saturday, August 9, 2014
New Searches Taking a closer look at exoplanets Friday, August 8, 2014
The Neighborhood Getting to know the neighbors Thursday, August 7, 2014
RECONS Taking a census of our stellar neighborhood Wednesday, August 6, 2014
Moon and Antares Inflating a stellar supergiant Tuesday, August 5, 2014
Moon and Saturn Saturn’s moons take a beating Monday, August 4, 2014
Moon and Companions The scorpion’s southern claw Sunday, August 3, 2014
Moon and Mars Coloring the Martian sky Saturday, August 2, 2014
Lunar Checkers The Moon plays a game of checkers Friday, August 1, 2014
Ranger 7 A successful crash in the Moon Race Thursday, July 31, 2014
WIMP-y Glow Bright evidence of dark matter Wednesday, July 30, 2014
Dark Center Darkness in the heart of the galaxy Tuesday, July 29, 2014
The Brick Building a future stellar nursery Monday, July 28, 2014
Galactic Track A roller-coaster ride around the galaxy Sunday, July 27, 2014
Old Family Looking into an old stellar family Saturday, July 26, 2014
Messier Clusters Logging star clusters in Sagittarius Friday, July 25, 2014
Moon and Venus Visiting the cool mountains of Venus Wednesday, July 23, 2014
Outcast Star A stellar outcast in the Big Dipper Tuesday, July 22, 2014
Moon and Aldebaran Changing a delicate balancing act Monday, July 21, 2014
Impact! Cosmic missiles slam into Jupiter Wednesday, July 16, 2014
Magellanic Collision New stars from a galactic collision Tuesday, July 15, 2014
Magellanic Clouds A new view of two close neighbors Monday, July 14, 2014
Asteroid Hunting Pointing the way to two asteroids Sunday, July 13, 2014
Dumbbell Nebula A blaze of color for a dying star Saturday, July 12, 2014
Venus and Mercury Bright, hot planets in the dawn sky Friday, July 11, 2014
Mars and Spica Two lights passing in the night sky Thursday, July 10, 2014
Vega A glittering test subject in the summer sky Wednesday, July 9, 2014
Moon and Antares Siblings that age at different rates Tuesday, July 8, 2014
Moon and Saturn Names for all the solar system Monday, July 7, 2014
Chameleon Star A star that’s changing colors Sunday, July 6, 2014
Moon, Mars, and Spica A close but wide-spread trio Saturday, July 5, 2014
Feeling the Heat Looking at the Sun from near and far Friday, July 4, 2014
Fresh Ideas Looking for fresh ideas Thursday, July 3, 2014
Pitching Ideas Pitching ideas for new missions Wednesday, July 2, 2014
Moon and Regulus Locking the Moon in position Tuesday, July 1, 2014
Cygnus Rising A starry bird and a Mayan king Monday, June 30, 2014
Moon and Jupiter Watching the twilight fade away Sunday, June 29, 2014
Alphecca Stellar siblings with different futures Saturday, June 28, 2014
Space Telescopes Studying the universe from on high Friday, June 27, 2014
Lyman Spitzer II A bold idea for exploring the universe Thursday, June 26, 2014
Lyman Spitzer Probing matter between the stars Wednesday, June 25, 2014
Serpens South Young stars that are hidden from view Tuesday, June 24, 2014
Moon and Venus A brilliant early morning encounter Monday, June 23, 2014
Close Quartet A nearby stellar quartet Sunday, June 22, 2014
Eagle Nebula Inspirational beauty in the southern sky Saturday, June 21, 2014
Summer Solstice Plotting the motions of the Sun Friday, June 20, 2014
Oxygen Breathing a creation of the stars Thursday, June 19, 2014
Eta Carinae III The spectacular death of a giant star Wednesday, June 18, 2014
Eta Carinae II Aggravating a supergiant star Tuesday, June 17, 2014
Eta Carinae Building up to a big eruption Monday, June 16, 2014
Leaping Gazelle A gazelle leaps across the sky Sunday, June 15, 2014
Disappearing Family A bright family drops from view Saturday, June 14, 2014
Summer Triangle Bright stars shine through the moonlight Friday, June 13, 2014
Cosmic Hailstones Telling tales of space rocks Thursday, June 12, 2014
Moon and Antares The amazing fate of a giant star Wednesday, June 11, 2014
Moon and Saturn Arriving at a fascinating destination Tuesday, June 10, 2014
Menkent The nearby shoulder of a centaur Monday, June 9, 2014
Moon and Spica Two stars with big futures Sunday, June 8, 2014
More Moon and Mars A planetary deepfreeze Saturday, June 7, 2014
Moon and Mars Evidence of life in a rock from Mars Friday, June 6, 2014
Rebuilding Rebuilding astronomical history Thursday, June 5, 2014
Clark Telescopes Celebrating some astronomical masterpieces Wednesday, June 4, 2014
Moon and Regulus A stellar whirling dervish Tuesday, June 3, 2014
Disappearing Cluster An evaporating star cluster Monday, June 2, 2014
Moon and Jupiter A study in contrasts in the evening sky Sunday, June 1, 2014
Moon and Planets Squashing a giant planet Saturday, May 31, 2014
Moon and Mercury Ghostly apparitions in the evening sky Friday, May 30, 2014
Companionship Looking for stellar companions Thursday, May 29, 2014
Messier 3 Tracking down false comets Wednesday, May 28, 2014
Hercules Cluster A starry realm without night Tuesday, May 27, 2014
Globular Clusters Stellar neighborhoods where it never gets dark Monday, May 26, 2014
Leo T A tiny galaxy with bright ambitions Sunday, May 25, 2014
Moon and Venus A case of deceptive beauty Saturday, May 24, 2014
Moon, Venus, and Meteors Promise and possibility in the early morning sky Friday, May 23, 2014
Surprise Shower? Looking for a new meteor shower Thursday, May 22, 2014
Distant Neighbors Looking for distant neighbors Wednesday, May 21, 2014
Distant Realms A realm of iceballs far from the Sun Tuesday, May 20, 2014
Distant Borders Crossing a distant border Monday, May 19, 2014
Too Close Getting too close to a dark monster Sunday, May 18, 2014
Rasalhague A preview of coming attractions Saturday, May 17, 2014
Planet Parade A parade of planets in the evening sky Friday, May 16, 2014
Evening Mercury Shrink-wrapping a small planet Thursday, May 15, 2014
Moon and Saturn Zipping past a distant giant Wednesday, May 14, 2014
More Saturn at Opposition Churning the seas of another world Tuesday, May 13, 2014
Saturn at Opposition Angling for a good view of Saturn Monday, May 12, 2014
Moon and Spica Violent scenarios for a binary star Sunday, May 11, 2014
Moon and Mars Digging holes on other worlds Saturday, May 10, 2014
McDonald at 75, V Studying the mysteries of the universe Friday, May 9, 2014
McDonald at 75, IV Probing the mysteries of the stars Thursday, May 8, 2014
McDonald at 75, III Collaboration in the name of science Wednesday, May 7, 2014
McDonald at 75, II Lawsuits, recruitment, and stars Tuesday, May 6, 2014
McDonald at 75 The start of a scientific adventure Monday, May 5, 2014
Eta Aquarid Meteors Naming a meteor shower Sunday, May 4, 2014
Moon and Jupiter Big geysers on big moons Saturday, May 3, 2014
Watery Asteroid Water vapor from a big ball of rock Friday, May 2, 2014
Distant Planets IV Young planets on the move Thursday, May 1, 2014
Distant Planets III A giant planet near the head of the water snake Wednesday, April 30, 2014
Distant Planets II A patient search for distant planets Tuesday, April 29, 2014
Distant Planets Looking for hard-to-find planets Monday, April 28, 2014
Loopy Planet A planet gets a little loopy Sunday, April 27, 2014
Beta Coma Berenices A star that’s a lot like our own Saturday, April 26, 2014
61 Virginis Some nearby planetary neighbors Friday, April 25, 2014
Moon and Venus Racking up the frequent-flyer miles Thursday, April 24, 2014
Space Fair A world’s fair for the Space Age Tuesday, April 22, 2014
Emptiness The emptiness between the stars Monday, April 21, 2014
Lyrid Meteor Shower Meteors for all occasions Sunday, April 20, 2014
Bear’s Lodge Looking down from the Big Dipper Saturday, April 19, 2014
Changing Skies Seeing through the moonlight Friday, April 18, 2014
Moon and Saturn A varied entourage of moons Wednesday, April 16, 2014
Bright and Fast A bright star that’s in a hurry Tuesday, April 15, 2014
More Lunar Eclipse Big entertainment in the night sky Monday, April 14, 2014
Lunar Eclipse Changing the course of history Sunday, April 13, 2014
North Galactic Pole Gazing away from the Milky Way Saturday, April 12, 2014
Runaway Stars Stars that are leaving home in a hurry Friday, April 11, 2014
Black Widow Pulsars Celestial creepy-crawlies Thursday, April 10, 2014
Mars at Opposition III The hazards of living on Mars Wednesday, April 9, 2014
Mars at Opposition II Catching the sunrise on Mars Tuesday, April 8, 2014
Mars at Opposition Snuggling fairly close to Mars Monday, April 7, 2014
Moon and Jupiter Winging through the skies of Jupiter Sunday, April 6, 2014
Moon in the Middle Bright stars packed around the Moon Saturday, April 5, 2014
Stepping Stone A long trip to nowhere Friday, April 4, 2014
To the Stars A tall ship and a star to sail her by Thursday, April 3, 2014
Fermi’s Paradox Where are all the little green men? Wednesday, April 2, 2014
Glowing Aliens Warming up to alien civilizations Tuesday, April 1, 2014
Lithopanspermia Catching a ride to the outer solar system Monday, March 31, 2014
‘Minor’ Constellations “Minor” constellations with major sights Sunday, March 30, 2014
Mariner 10 at Mercury A first look at a little planet Saturday, March 29, 2014
Spring Milky Way The Milky Way brackets the night sky Friday, March 28, 2014
More Moon and Venus Probing an unpredictable polar vortex Thursday, March 27, 2014
Moon and Venus A roller-coaster ride for a bright planet Wednesday, March 26, 2014
Galactic Archaeology Digging into the history of the galaxy Monday, March 24, 2014
Heart of Charles Stirring up the Heart of Charles Saturday, March 22, 2014
Moon and Antares A journey to a stellar supergiant Friday, March 21, 2014
Spring Equinox Projecting the spring equinox Thursday, March 20, 2014
Moon and More Companions Taking aim at the scorpion’s claw Wednesday, March 19, 2014
More Moon and Companions Getting close to bright Mars Tuesday, March 18, 2014
Moon and Companions Seeing orange on a nearby planet Monday, March 17, 2014
Old Mars Rock A relic of a bygone era on Mars Sunday, March 16, 2014
Condor Galaxy The condor stretches its galactic wings Saturday, March 15, 2014
Mercury in the Morning An irritating planet in the dawn twilight Friday, March 14, 2014
Moon and Regulus Bright flashes on the surface of the Moon Thursday, March 13, 2014
Blackout! The Sun turns out the lights Wednesday, March 12, 2014
Quaoar Measuring a distance ice-ball Tuesday, March 11, 2014
Moon and Jupiter Building a solar system giant Sunday, March 9, 2014
Yakov Zel’dovich From exploding bombs to exploding stars Saturday, March 8, 2014
Moon and Aldebaran Keeping an eye on the bull’s eye Friday, March 7, 2014
K2 Plan K2 from outer space Thursday, March 6, 2014
Double Duty A space telescope does double duty Wednesday, March 5, 2014
In-Between Planets Super-Earths and mini-Neptunes Tuesday, March 4, 2014
Kepler A space telescope piles up the planets Monday, March 3, 2014
Pollux A “wobbly” planetary discovery Sunday, March 2, 2014
Castor Rare sextuplets among the stars Saturday, March 1, 2014
Rosette Nebula A colorful stellar birthplace Friday, February 28, 2014
Cone Nebula A small, dark “horn” for the unicorn Thursday, February 27, 2014
NGC 2264 Lighting up a stellar nursery Wednesday, February 26, 2014
Monoceros A vision in blue in the unicorn Tuesday, February 25, 2014
Moon and Venus Love and beauty in the dawn sky Monday, February 24, 2014
Zeta Cas A star that's far above average Sunday, February 23, 2014
Earths Galore Earth-like planets by the millions Saturday, February 22, 2014
Moon and Companions Quartering the Moon Friday, February 21, 2014
Moon and Saturn Sculpting the rings of Saturn Thursday, February 20, 2014
Moon and Mars A garden spot on the Red Planet Wednesday, February 19, 2014
Moon and Spica A star of the first magnitude Tuesday, February 18, 2014
Making Nitrogen Breathing the “ash” of dead stars Monday, February 17, 2014
Alnilam A bright buckle for the hunter’s belt Sunday, February 16, 2014
Dubhe A bright orphan in the Big Dipper Saturday, February 15, 2014
Moon and Regulus Busy times for the Moon Friday, February 14, 2014
Brilliant Venus The “morning star” at its brightest Thursday, February 13, 2014
Fast Radio Bursts Mysterious outbursts of radio waves Wednesday, February 12, 2014
Outbursts Flickering lights in the night sky Tuesday, February 11, 2014
Moon and Jupiter Creating a powerful magnetic field Monday, February 10, 2014
Hint of Spring A hint of spring in the evening sky Sunday, February 9, 2014
Rivals Separating a pair of mortal enemies Saturday, February 8, 2014
Moon and Aldebaran Taking the measure of the bull’s eye Friday, February 7, 2014
Z Machine IV Astronomy in a test tube Thursday, February 6, 2014
Z Machine III Making a star in a bottle Wednesday, February 5, 2014
Z Machine II The power source of the stars Tuesday, February 4, 2014
Z Machine Firing the world’s biggest X-ray machine Monday, February 3, 2014
Southern Slivers Slivers of stars in the southern sky Sunday, February 2, 2014
Orion’s Footstool A resting spot for the hunter Saturday, February 1, 2014
Evening Mercury The wrinkled skin of a small planet Friday, January 31, 2014
Adhara A different view of a hot star Thursday, January 30, 2014
Wezen Dumping chemicals into space Wednesday, January 29, 2014
Mirzam Revving up a celestial dog Tuesday, January 28, 2014
Moon and Venus A beautiful dawn encounter Monday, January 27, 2014
Morning Planets Lining up some early morning planets Sunday, January 26, 2014
California Nebula California in the stars Saturday, January 25, 2014
Moon and Saturn Plunging into a turbulent world Friday, January 24, 2014
Orion Nebula A busy stellar nursery Thursday, January 23, 2014
Moon and Spica Lining up a lunar encounter Wednesday, January 22, 2014
Moon and Mars Taking a trip to Mars Tuesday, January 21, 2014
Canopus Navigating by a special star Monday, January 20, 2014
Evening Clusters Star clusters for the charioteer Sunday, January 19, 2014
Moon and Regulus One set of stars, two pictures Saturday, January 18, 2014
Morning Planets Bright planets in the dawn sky Friday, January 17, 2014
M101 ULX-1 Weirdness in a nearby galaxy Thursday, January 16, 2014
Black Hole Collisions Tiny threats rip through Earth Wednesday, January 15, 2014
Moon and Jupiter A giant, icy moon Tuesday, January 14, 2014
Hot Weather Hot weather on failed stars Monday, January 13, 2014
Moon in the Middle Boxing in the gibbous Moon Sunday, January 12, 2014
Moon and Aldebaran Peeking at the Moon’s backside Saturday, January 11, 2014
Earth Impacts V Protecting Earth from space rocks Friday, January 10, 2014
Earth Impacts IV Going to work for planetary defense Thursday, January 9, 2014
Earth Impacts III Violence and beauty in the Sahara Wednesday, January 8, 2014
Earth Impacts II Kick starting an Ice Age Tuesday, January 7, 2014
Earth Impacts The scars of a celestial pounding Monday, January 6, 2014
Jupiter at Opposition Pacing off the distance to a giant Sunday, January 5, 2014
Mars Exploration Rovers Two visitors for the planet Mars Saturday, January 4, 2014
Getting Close Snuggling close to two giants Friday, January 3, 2014
Quadrantid Meteors Looking for the parent of a meteor shower Thursday, January 2, 2014
Stardust Catching bits of comet dust Wednesday, January 1, 2014
Getting Started Cooking up a piece of glass Tuesday, December 31, 2013
Vanishing Venus The demise of the evening star Monday, December 30, 2013
Midnight Stars Celebrating with the stars Sunday, December 29, 2013
Life of Procyon The life of the Little Dog Star Saturday, December 28, 2013
Moon and Saturn Riding waves in Saturn’s rings Friday, December 27, 2013
Comet Flop A good view of a cometary dud Thursday, December 26, 2013
Moon and Companions Sniffing out life on Mars Wednesday, December 25, 2013
Moon and Mars Mars gets a holiday visitor Tuesday, December 24, 2013
Golden Mergers Mining gold from a black hole Monday, December 23, 2013
Moon and Regulus Beating up the surface of the Moon Sunday, December 22, 2013
Winter Solstice Drawing up the winter solstice Saturday, December 21, 2013
Star Songs Tuning in to the stars Friday, December 20, 2013
EX Hydrae Two small but busy stars Thursday, December 19, 2013
Moon and Jupiter Heating up a giant planet Wednesday, December 18, 2013
NGC 660 The glow of escaping table scraps Tuesday, December 17, 2013
Long-Night Moon Filling the night with moonlight Monday, December 16, 2013
Moon and Aldebaran Looking for a place to settle down Sunday, December 15, 2013
Super Origins A refugee from the planet Krypton Saturday, December 14, 2013
Geminid Meteors II A bright but temporary meteor shower Friday, December 13, 2013
Geminid Meteors Feeding a meteor shower Thursday, December 12, 2013
Annie Jump Cannon II Classifying the stars Wednesday, December 11, 2013
Annie Jump Cannon A rare astronomical opportunity Tuesday, December 10, 2013
Pickering’s Harem Pioneering at 25 cents an hour Monday, December 9, 2013
More Aquarius A pair of yellow supergiants Sunday, December 8, 2013
Aquarius Freezing a celestial water jug Saturday, December 7, 2013
Sirius Rising The right season for the Dog Star Friday, December 6, 2013
Fixing Hubble Improving Hubble’s eyesight Thursday, December 5, 2013
Moon and Venus Lighting up a Venusian day Wednesday, December 4, 2013
Pioneer 10 at Jupiter Going eye-to-eye with a giant Tuesday, December 3, 2013
Blue-Hot Planet A visit to another blue planet Monday, December 2, 2013
Mars Companions Distant companions for the Red Planet Sunday, December 1, 2013
Moon and Planets Two planets wander across the sky Saturday, November 30, 2013
Escaped Star A star that escaped from its nest Friday, November 29, 2013
Moon and Spica Following the rhythms of the night Thursday, November 28, 2013
Sunward Bound A comet blazes toward the Sun Wednesday, November 27, 2013
Moon and Mars A change of address for Mars Tuesday, November 26, 2013
Moon and Companions Growing fresh veggies on the Moon Monday, November 25, 2013
Dawn Planets Siblings with no family resemblance Sunday, November 24, 2013
Uncertain Giant Taking the measure of a giant star Saturday, November 23, 2013
Orion Rising Jumbo stars climb into view Friday, November 22, 2013
More Moon and Jupiter Patching up the night sky Thursday, November 21, 2013
Moon and Jupiter Centering up a bright duo Wednesday, November 20, 2013
Capella A pair of bright, “puffy” stars Tuesday, November 19, 2013
Moon and Aldebaran Building mountains on the Moon Monday, November 18, 2013
MAVEN The disappearing Martian air Sunday, November 17, 2013
William Herschel III Dangerous nights at the telescope Saturday, November 16, 2013
William Herschel II Making up for lost time Friday, November 15, 2013
William Herschel A musical intro for a noted astronomer Thursday, November 14, 2013
Antarctic Adventures III The dark skies of the Antarctic Wednesday, November 13, 2013
Antarctic Adventures II Cruising above the Antarctic ice Tuesday, November 12, 2013
Antarctic Adventures Ice, rocks, and other worlds Monday, November 11, 2013
Triangulum Galaxy A galaxy that’s losing its identity Sunday, November 10, 2013
Andromeda Galaxy III Building a galactic giant Saturday, November 9, 2013
Andromeda Galaxy II Black holes in a neighboring galaxy Friday, November 8, 2013
Andromeda Galaxy A journey into the distant past Thursday, November 7, 2013
Andromeda A colorful stellar quartet Wednesday, November 6, 2013
Moon and Venus Lighting up a night sky Tuesday, November 5, 2013
HETDEX Update An upgrade for dark energy Monday, November 4, 2013
Distant Cloud A remnant of the Big Bang Sunday, November 3, 2013
Solar Eclipse A rare solar eclipse Saturday, November 2, 2013
Getting Closer A comet streaks toward the Sun Friday, November 1, 2013
The Crane A crane strides across the southern sky Thursday, October 31, 2013
War of the Worlds An attack from Mars Wednesday, October 30, 2013
Under Attack Earth is attacked by a star Tuesday, October 29, 2013
Moon and Mars A comfortable planetary neighbor Monday, October 28, 2013
Moon and Company An effective type of sun block Sunday, October 27, 2013
The Disrespected Two “slithery” constellations Saturday, October 26, 2013
More Moon and Jupiter Wrapping a spacecraft in plastic Friday, October 25, 2013
Moon and Jupiter The king of the Olympics Thursday, October 24, 2013
Tail Stars The back ends of two constellations Wednesday, October 23, 2013
Watery Skies Casting off into the Celestial Sea Tuesday, October 22, 2013
Moon and Aldebaran Peeking through the moonlight Monday, October 21, 2013
Orionid Meteors Moonlight and meteors Sunday, October 20, 2013
Abu Simbel Lighting an ancient sanctuary Saturday, October 19, 2013
Hunter’s Moon Hunting up a faint eclipse Friday, October 18, 2013
Carbon Monoxide Tracing the birth of stars Thursday, October 17, 2013
Venus and Antares Losing a “summer” star Wednesday, October 16, 2013
More Fomalhaut A giant planet of mystery Tuesday, October 15, 2013
Fomalhaut Surprises from a well-studied star Monday, October 14, 2013
Mars and Regulus Wandering across the night sky Sunday, October 13, 2013
Pleiades White Dwarf A star that went gently into the night Saturday, October 12, 2013
Icy Mars Digging into Mars’s frozen past Friday, October 11, 2013
Heading for Mars Streaking down Martian slopes Thursday, October 10, 2013
Mars on Earth Looking for Mars on Earth Wednesday, October 9, 2013
Juno at Earth Getting a boost from home Tuesday, October 8, 2013
Moon and Venus Paving the surfaces of two worlds Monday, October 7, 2013
Draconid Meteors Sparks from the celestial dragon Sunday, October 6, 2013
Merging Stars Two stars that become one Saturday, October 5, 2013
Gaia Counting up the stars Thursday, October 3, 2013
Uranus at Opposition II A giant entourage for a giant planet Wednesday, October 2, 2013
Uranus at Opposition Pondering some “giant” mysteries Tuesday, October 1, 2013
Moon and Companions Warming up a Martian hemisphere Monday, September 30, 2013
Moon and Mars Gentle giants on the planet Mars Sunday, September 29, 2013
Moon and Jupiter Looking for a giant planet Saturday, September 28, 2013
ER Vulpeculae Two stars locked in a tight embrace Friday, September 27, 2013
The Coathanger Gazing deep into a coat hanger Thursday, September 26, 2013
NGC 7052 Livening up a dull galaxy Wednesday, September 25, 2013
Dumbbell Nebula A colorful final act Tuesday, September 24, 2013
Vulpecula The fox and goose in the night sky Monday, September 23, 2013
Autumn Nodding away from the Sun Sunday, September 22, 2013
Journey’s End A long journey comes to an end Saturday, September 21, 2013
Slowing Down A dead star slows down Friday, September 20, 2013
Whistlers Listening for stormy skies Thursday, September 19, 2013
Harvest Moon Harvesting some extra moonlight Wednesday, September 18, 2013
To the Stars Building a road to the stars Tuesday, September 17, 2013
Venus and Saturn Windy planets in the evening sky Monday, September 16, 2013
Winter Preview Taking a sneak peek at winter Sunday, September 15, 2013
Star Names The language of the stars Saturday, September 14, 2013
Friday the Thirteenth A day with an undeserved reputation Friday, September 13, 2013
Alpheratz One star, two constellations Thursday, September 12, 2013
Moon and Antares A bubbly stellar supergiant Wednesday, September 11, 2013
A Tale of Two Skies Taking a spin on a merry-go-round Tuesday, September 10, 2013
Moon and Saturn A planet with a nameless surface Monday, September 9, 2013
Moon and Venus Phasing in on the “evening star” Sunday, September 8, 2013
Vega Stands High Crowning the early evening sky Saturday, September 7, 2013
Getting Closer Climbing high to see a comet Friday, September 6, 2013
Venus and Spica The always-hot “evening star” Thursday, September 5, 2013
Local Arm Wrapping our arms around our home galaxy Wednesday, September 4, 2013
A New Start An observatory gets a new start Tuesday, September 3, 2013
Changing Directions A change of direction for McDonald Observatory Monday, September 2, 2013
Moon and Mars Drilling holes in the surface of Mars Sunday, September 1, 2013
Moon in the Middle The Moon and a bright triangle Saturday, August 31, 2013
Moon and Jupiter An adventure traveler’s idea of heaven Friday, August 30, 2013
Bernard Lovell Pioneering a new way to see the universe Thursday, August 29, 2013
Asteroid Moons Asteroids with small companions Wednesday, August 28, 2013
Moon and Aldebaran Looking 67 years back in time Tuesday, August 27, 2013
Neptune at Opposition Probing deep into a planet’s atmosphere Monday, August 26, 2013
M18 A faint cluster with a bright pedigree Sunday, August 25, 2013
Equuleus Two stars whose fates are intertwined Saturday, August 24, 2013
Spitzer Space Telescope Taking a good look at an exoplanet Friday, August 23, 2013
Infrared Astronomy Casting eyes on the cold sky Thursday, August 22, 2013
Unseen Saturn Unseen visions of a bright planet Wednesday, August 21, 2013
Pulsar Tales Dead stars that won’t shut up Tuesday, August 20, 2013
Desert Astronomy Astronomy in a desert wasteland Monday, August 19, 2013
Gamma Cassiopeia Pointing out a celestial letter Sunday, August 18, 2013
Dog Days The “dog days” of summer Saturday, August 17, 2013
HAT P-7 Cooling off a distant star Friday, August 16, 2013
Toasted Planets Toasting planets from the inside out Thursday, August 15, 2013
Moon and Antares Dusting off some moonrocks Wednesday, August 14, 2013
Rare Elements Creating elements between the stars Tuesday, August 13, 2013
Moon and Saturn Diving into a possible water world Monday, August 12, 2013
Moon, Spica, and Meteors A double feature in the night sky Sunday, August 11, 2013
More Moon and Venus Stirring up some lunar dust Saturday, August 10, 2013
Moon and Venus An unforgiving environment Friday, August 9, 2013
Water Carriers Starry vessels in the midnight sky Thursday, August 8, 2013
Dark Detections Looking for particles that don’t wimp out Wednesday, August 7, 2013
Dark Experiments Looking for the unseeable Tuesday, August 6, 2013
Dark Universe Adding up the universe Monday, August 5, 2013
M4 An ancient city of stars Sunday, August 4, 2013
More Moon and Planets The Moon and a horde of planets Saturday, August 3, 2013
Moon and Planets The Moon and a lineup of planets Friday, August 2, 2013
Sheliak A stellar tug-of-war Thursday, August 1, 2013
Tardigrades Water bears in space Wednesday, July 31, 2013
Orbital Menagerie An entire zoo of space travelers Tuesday, July 30, 2013
Spinning in Orbit Spinning around the Earth Monday, July 29, 2013
Alkaid Anchoring the Big Dipper Sunday, July 28, 2013
Megrez Holding together the Big Dipper Saturday, July 27, 2013
Counting Stars Counting the stars in the Milky Way Friday, July 26, 2013
Black Hole Beacon A black hole announces its presence Thursday, July 25, 2013
Galactic Bubbles Keeping food from a black hole Wednesday, July 24, 2013
Good Neighborhood A good neighborhood for young stars? Tuesday, July 23, 2013
Sagittarius A teapot in the southern sky Monday, July 22, 2013
Jupiter and Mars Jogging into the morning sky Sunday, July 21, 2013
Venus and Regulus A fairy tale in the evening sky Saturday, July 20, 2013
Bookends Bookending morning and evening skies Friday, July 19, 2013
Moon and Antares Clouding up nearby space Thursday, July 18, 2013
Water World Diving into lunar research Wednesday, July 17, 2013
Moon and Saturn A radio story from a giant planet Tuesday, July 16, 2013
Moon and Spica Lining up a celestial encounter Monday, July 15, 2013
Zubenelgenubi A complex claw for the scorpion Sunday, July 14, 2013
Zubeneschamali Balancing the scorpion’s claws Saturday, July 13, 2013
Solar Highway Following the path of the Sun Friday, July 12, 2013
Moon and Regulus The lion’s quadruple heart Thursday, July 11, 2013
Moon and Venus Heating up the “evening star” Wednesday, July 10, 2013
Megastars “Megastars” in a nearby galaxy Tuesday, July 9, 2013
Delphinus Sneaking into astronomical history Monday, July 8, 2013
Barnard 68 Lighting up a dark cloud Sunday, July 7, 2013
Albireo A colorful stellar duo Saturday, July 6, 2013
Distant Sun Moving away from the Sun Friday, July 5, 2013
Moon and Aldebaran The beginning of the end Thursday, July 4, 2013
Giant Blast Blasting apart a giant star Wednesday, July 3, 2013
‘Medium’ Nova A mid-size stellar explosion Tuesday, July 2, 2013
July Honoring a famous calendar maker Monday, July 1, 2013
Sky Test A test for dark night skies Sunday, June 30, 2013
Odd Ophiuchus An odd shape with a grand distinction Saturday, June 29, 2013
Unifying the Universe A theory of everything Friday, June 28, 2013
The Standard Model A theory of almost everything Thursday, June 27, 2013
Anti-Discovery The possible signature of dark matter Wednesday, June 26, 2013
On Station II Brilliant targets for the space station Tuesday, June 25, 2013
On Station New “eyes” for the space station Monday, June 24, 2013
Colorful Arcturus Adding some color to a bright star Sunday, June 23, 2013
Maximilian Wolf Snapping pictures of the night sky Saturday, June 22, 2013
Moon and Antares An inspiring stellar giant Friday, June 21, 2013
Summer Lining up the summer solstice Thursday, June 20, 2013
Moon and Saturn Changing seasons on two worlds Wednesday, June 19, 2013
Evening Treats Highlights of the evening sky Tuesday, June 18, 2013
Venus and Mercury Artists land on another world Monday, June 17, 2013
Breaking Ground A “seagull” takes flight Sunday, June 16, 2013
Galactic Thief A case of galactic thievery Saturday, June 15, 2013
Dusty Vega Stirring up dust around a bright star Friday, June 14, 2013
Older Vega A well-known star gets older Thursday, June 13, 2013
Summer Triangle Creating pictures in the stars Wednesday, June 12, 2013
More Moon and Planets Putting a new spin on the evening star Tuesday, June 11, 2013
Moon and Planets Lining up the “evening star” Monday, June 10, 2013
Sunquakes Rumbling through the Sun Sunday, June 9, 2013
At the Edge At the edge of the solar system Saturday, June 8, 2013
Young-Sun Paradox II A weight-loss plan for the Sun Friday, June 7, 2013
Young-Sun Paradox Turning up the thermostat Thursday, June 6, 2013
Changing Sun Our steadily changing Sun Wednesday, June 5, 2013
New Solar Telescopes New eyes on our neighborhood star Tuesday, June 4, 2013
Solar Telescopes Taking a close look at the Sun Monday, June 3, 2013
Solar Twins II Hunting for worlds like Earth Sunday, June 2, 2013
Solar Twins A star that looks familiar Saturday, June 1, 2013
M101 A beautiful galactic neighbor Friday, May 31, 2013
Twinkling Jewels Up-and-down stars in the northern crown Thursday, May 30, 2013
Northern Crown Crowning the night sky Wednesday, May 29, 2013
Mercury Rising Cold pockets on a hot planet Tuesday, May 28, 2013
Bright Contrasts Different worlds with a similar look Monday, May 27, 2013
Soothing Moon Stirring up some epsom salts Sunday, May 26, 2013
Evening Planets Celestial theater in the evening sky Saturday, May 25, 2013
A New Cycle Beginning a new lunar cycle Friday, May 24, 2013
The Hunting Dogs Chasing the great bear Thursday, May 23, 2013
Moon and Saturn A leisurely trek through the stars Wednesday, May 22, 2013
Moon and Spica A small but vast astronomical gap Tuesday, May 21, 2013
Close Companions A black hole devours a companion Monday, May 20, 2013
M13 Some bright stellar mysteries Sunday, May 19, 2013
Hercules The strongman strides across the night sky Saturday, May 18, 2013
Moon and Regulus Lining up some bright moonlight Friday, May 17, 2013
Faith 7 The end of a space-age singles act Thursday, May 16, 2013
Nicolas Louis de Lacaille Mapping southern skies Wednesday, May 15, 2013
Skylab High-flying eyes on the Sun Tuesday, May 14, 2013
Setting a Date Zeroing in on the Big Bang Monday, May 13, 2013
More Moon and Jupiter The dusty space around Jupiter Sunday, May 12, 2013
Moon and Jupiter A bright trio in the evening sky Saturday, May 11, 2013
Getting Away Escaping from a black hole in a hurry Friday, May 10, 2013
Annular Eclipse A ring of fire above the Pacific Ocean Thursday, May 9, 2013
Keeping Tabs Keeping an eye on a fuzzy foot Wednesday, May 8, 2013
Recalibrating Recalibrating a space telescope Tuesday, May 7, 2013
File Cabinet Leafing through a starry filing cabinet Monday, May 6, 2013
Big and Little “Extreme” constellations Sunday, May 5, 2013
Eta Aquarid Meteors Sparks from a “wet” constellation Saturday, May 4, 2013
Model Cosmos Taking the measure of the solar system Friday, May 3, 2013
Star Factory A massive factory for making stars Thursday, May 2, 2013
Star Wheel Whirling around the North Star Wednesday, May 1, 2013
Muons II Probing the past with particles from space Tuesday, April 30, 2013
Muons Zapped by a supernova Monday, April 29, 2013
GALEX Keeping an eye on the galactic action Sunday, April 28, 2013
Moon and Antares Naming a “rival” of Mars Saturday, April 27, 2013
Saturn at Opposition Stirring up some giant storms Friday, April 26, 2013
Moon and Saturn A futuristic buggy race Thursday, April 25, 2013
Moon and Spica Neighbors that stir things up Wednesday, April 24, 2013
Sutter’s Mill A new strike at Sutter’s Mill Tuesday, April 23, 2013
Bright Visitors Bright visitors from beyond Earth Monday, April 22, 2013
Alpha Centauri Planet A nearby planetary neighbor Sunday, April 21, 2013
Moon and Regulus A special day for astronomy Saturday, April 20, 2013
Coma Galaxy Cluster A brilliant cluster of galaxies Friday, April 19, 2013
Coma Star Cluster Golden tresses and glistening stars Thursday, April 18, 2013
Messy Impact Debating a devastating impact Wednesday, April 17, 2013
The Antennae Seeing the future of the Milky Way Tuesday, April 16, 2013
Moon and Jupiter Measuring the skin of the Moon Sunday, April 14, 2013
Moon in Taurus Drawing some stellar pictures Saturday, April 13, 2013
Messy Giant Kicking up dust around a giant star Friday, April 12, 2013
Time and Navigation A helpful device for seeing the world Thursday, April 11, 2013
Celestial Navigation Navigating by the stars Wednesday, April 10, 2013
Magnetic Directions Navigating with an internal compass Tuesday, April 9, 2013
Magnetic Earth Earth’s changing magnetic field Monday, April 8, 2013
Tau Boötis Keeping an eye on a star with a planet Sunday, April 7, 2013
Boötes A constellation with a confused history Saturday, April 6, 2013
Gamma-2 Velorum A star exposes its inner workings Friday, April 5, 2013
Zeta Puppis A rare stellar hothead Wednesday, April 3, 2013
Puppis A naming slight for a leading light Tuesday, April 2, 2013
Argo Navis Sailing across the southern sky Monday, April 1, 2013
Groombridge 1830 An interloper from a distant realm Sunday, March 31, 2013
Moon and Antares Evidence of ancient chemical factories Saturday, March 30, 2013
Moon and Saturn Sharing tracks around a giant planet Friday, March 29, 2013
Moon and Companions A bright highlight on the dark Moon Thursday, March 28, 2013
Zapped! Part II An outburst from a pair of dead stars Wednesday, March 27, 2013
Zapped! Earth gets zapped by cosmic radiation Tuesday, March 26, 2013
Pyramid Stars Guiding lights of the ancient world Monday, March 25, 2013
More Moon and Regulus Protecting some lunar monuments Sunday, March 24, 2013
Moon and Regulus Putting the squeeze on a star Saturday, March 23, 2013
Cracking Up A neutron star cracks up Friday, March 22, 2013
Neutron Stars Gravity wins the stellar battle Thursday, March 21, 2013
Spring Springing into a new season Tuesday, March 19, 2013
The Bull’s Horns The Moon takes the bull by the horns Monday, March 18, 2013
Moon and Companions The Moon slides across the sky Sunday, March 17, 2013
Guitar Nebula Strumming a few astronomical notes Saturday, March 16, 2013
Capistrano Meteorite A California town gets a visitor Friday, March 15, 2013
Dark Energy Camera Some impressive astronomical snapshots Thursday, March 14, 2013
ALMA Cranking up a giant new telescope Wednesday, March 13, 2013
Pulsar Planets Reborn from a violent demise Tuesday, March 12, 2013
Planetary Debris Rocky evidence of planetary systems Monday, March 11, 2013
In the Zone Comfortable worlds around feeble stars Sunday, March 10, 2013
Lots of Planets Strength of discovery in numbers Saturday, March 9, 2013
Four Suns A world with four suns in the sky Friday, March 8, 2013
Planet Hunters Hunting for leftover planets Thursday, March 7, 2013
Ringing Beat The beat of vibrating stars Wednesday, March 6, 2013
Side Jobs A space telescope gets some extra jobs Tuesday, March 5, 2013
Comet PanStarrs A comet gets ready to shine Monday, March 4, 2013
Moon and Antares Two stars with different fates Sunday, March 3, 2013
Adhara Another impressive “dog” star Saturday, March 2, 2013
Moon and Saturn Wrapped in a magnetic embrace Friday, March 1, 2013
Moon and Spica Illumination from a disappearing act Thursday, February 28, 2013
Alcyone Spinning up a bright young star Wednesday, February 27, 2013
Small Black Holes II Black holes that fizzle in a hurry Tuesday, February 26, 2013
Small Black Holes Looking for tiny black holes Monday, February 25, 2013
Moon and Regulus A different kind of star system Sunday, February 24, 2013
Yardsticks Measuring astronomical distances Saturday, February 23, 2013
Procyon A pair of stellar light bulbs Friday, February 22, 2013
Polaris III Poking into the life of a famous star Thursday, February 21, 2013
Polaris II The un-steady beat of the North Star Wednesday, February 20, 2013
Moon, Jupiter, and Aldebaran Jupiter’s large adopted family Monday, February 18, 2013
Moon and Jupiter A large, close-knit planetary family Sunday, February 17, 2013
Mercury in the Evening A visit from a reticent planet Saturday, February 16, 2013
The Beehive Brightening up a meager constellation Friday, February 15, 2013
Space Watch IV A very close encounter Thursday, February 14, 2013
Space Watch III Painting our way out of a jam Wednesday, February 13, 2013
Space Watch II Searching for cosmic bullets Tuesday, February 12, 2013
Space Watch A target in a cosmic shooting gallery Monday, February 11, 2013
Double Cluster Sparkling stellar jewels Sunday, February 10, 2013
Milky Way Matters The Milky Way bulks up Saturday, February 9, 2013
Quasars IV An astronomical navigation system Friday, February 8, 2013
Quasars III The glory days for a black hole Thursday, February 7, 2013
Quasars II Lighting up a distant galaxy Wednesday, February 6, 2013
Quasars The long-range secret of odd “stars” Tuesday, February 5, 2013
Moon and Antares A hot-but-cool stellar supergiant Monday, February 4, 2013
Crimson Star An aging but colorful star Sunday, February 3, 2013
Grand Sky A “grand” view of the night sky Saturday, February 2, 2013
Moon and Companions From leading light to a pale second Friday, February 1, 2013
Nowhere to Hide Hiding in plain sight Thursday, January 31, 2013
Bright Black Hole Brightness from the ultimate darkness Wednesday, January 30, 2013
M31’s Central Cluster Bright stars around a galaxy’s dark heart Tuesday, January 29, 2013
Missed Opportunity Missing a “stellar” opportunity Monday, January 28, 2013
Winter Circle Bracketing the Winter Circle Saturday, January 26, 2013
IRAS Opening fresh eyes on the universe Friday, January 25, 2013
Hot Planet The glow of a small but hot planet Thursday, January 24, 2013
Superflares Super explosions on other stars Wednesday, January 23, 2013
Flashy Neighbor Evidence of a flashy neighbor Tuesday, January 22, 2013
Moon and Jupiter Tiny planets around a tiny star Sunday, March 25, 2012
Moon and Jupiter Worlds that have taken a beating Monday, January 21, 2013
Canopus The silver medalist of bright stars Sunday, January 20, 2013
Great Square of Pegasus Connecting the dots of a starry square Saturday, January 19, 2013
M35 A crowded stellar neighborhood Friday, January 18, 2013
Epsilon Geminorum A star by the numbers Thursday, January 17, 2013
Pollux Younger but “older” than the Sun Wednesday, January 16, 2013
Castor Three sets of stellar twins Tuesday, January 15, 2013
Gemini An uncommon story in the night sky Monday, January 14, 2013
More Moon and Mars Taking a ride on a Martian moon Sunday, January 13, 2013
Bigger Diamonds Real astronomical “sparklers” Friday, January 11, 2013
Diamonds Making “ice” from fire Thursday, January 10, 2013
Apophis Keeping an eye on a troublemaker Tuesday, January 8, 2013
Moon and Antares Building a stellar onion Saturday, July 28, 2012
M2 A distant home for old stars Sunday, January 6, 2013
Moon and Saturn A giant storm that kept on going Saturday, January 5, 2013
Moon and Spica Giant tides on giant stars Friday, January 4, 2013
Bright Interlopers Disorderly visitors head inward Thursday, January 3, 2013
Comets Icy remnants from the birth of the planets Wednesday, January 2, 2013
Fire and Ice Fire and ice in the sky Tuesday, January 1, 2013
Holiday Skies Lighting up the holiday sky Monday, December 31, 2012
More Sirius A stellar weight-loss program Sunday, December 30, 2012
Sirius A beautiful dog gets closer Saturday, December 29, 2012
The Footstool A footstool for the hunter Friday, December 28, 2012
Long-Night Moon Lighting up the long night Thursday, December 27, 2012
Moon and Jupiter III Mixing up some lunar water Wednesday, December 26, 2012
Moon and Jupiter II Lighting up the Christmas-night sky Tuesday, December 25, 2012
Moon and Jupiter Bright lights for Christmas Eve Monday, December 24, 2012
Northern Cross A star pattern with a double identity Sunday, December 23, 2012
Venus and Antares Snow clouds on a hot world? Saturday, December 22, 2012
Winter Solstice A changing calendar cycle Friday, December 21, 2012
Storm Probes Plunging into the danger zone Thursday, December 20, 2012
The Sun III Looking for the surface of the Sun Wednesday, December 19, 2012
The Sun II The long trip before the journey begins Tuesday, December 18, 2012
The Sun Powering up the Sun Monday, December 17, 2012
Earliest Sunset Stretching out the December sunset Sunday, December 16, 2012
Moon and Mars Visitors from other worlds Saturday, December 15, 2012
More Mariner 2 Destroying a “second Earth” Friday, December 14, 2012
Mariner 2 Pioneering a path to another world Thursday, December 13, 2012
Geminid Meteors Bright accents for a night of skywatching Wednesday, December 12, 2012
Lunar Returns The continued exploration of the Moon Tuesday, December 11, 2012
Apollo 17 A busy three days on the Moon Monday, December 10, 2012
More Moon and Companions A grand era of exploration Sunday, December 9, 2012
Moon and Companions Nothing to fear in the morning sky Saturday, December 8, 2012
More Capella Seeing a star in a different light Friday, December 7, 2012
Capella Bright stars with a bright future Thursday, December 6, 2012
First Steps Angling in on the stars Wednesday, December 5, 2012
RR Lyrae The rhythmic beat of a star Tuesday, December 4, 2012
Star Populations Segregating the stars of the Milky Way Monday, December 3, 2012
Jupiter at Opposition II Jupiter proves its superiority Sunday, December 2, 2012
Nukes in Space II Futuristic rockets from the past Friday, November 30, 2012
Nukes in Space Powering a mission to Mars Thursday, November 29, 2012
Moon and Jupiter A chilly Moon for a chilly time of year Wednesday, November 28, 2012
Feeble Eclipse Earth casts a feeble shadow on the Moon Tuesday, November 27, 2012
Orion Rising A treat returns to the evening sky Monday, November 26, 2012
Venus and Saturn Wandering through the night sky Sunday, November 25, 2012
Deuterium Drinking up the Big Bang Saturday, November 24, 2012
Ice Volcanoes Icy eruptions on an icy moon Friday, November 23, 2012
Cold Oasis Filling up a desert oasis Thursday, November 22, 2012
‘Young’ Moon A moon that doesn’t look its age Wednesday, November 21, 2012
‘Titanic’ Discoveries II Getting to know a distant moon Tuesday, November 20, 2012
‘Titanic’ Discoveries A big moon keeps its secrets Monday, November 19, 2012
Menkar A constellation with a case of the big head Sunday, November 18, 2012
Venus and Spica A star that’s more than meets the eye Saturday, November 17, 2012
Triple Treat A skywatching triple feature Friday, November 16, 2012
Moon and Mars Mars hangs out in the evening sky Thursday, November 15, 2012
Sweet Discovery A “sweet” discovery at a distant star Wednesday, November 14, 2012
Molecule Factory Whipping up some complex molecules Tuesday, November 13, 2012
Solar Eclipse Diving into a natural wonder Monday, November 12, 2012
Moon and Saturn Stirring up a giant hurricane Sunday, November 11, 2012
Moon and Companions Taking a peek at the Moon’s backside Saturday, November 10, 2012
VERITAS Sparks from extreme cosmic environments Friday, November 9, 2012
Namibian Astronomy II Strange eyes on the gamma-ray sky Thursday, November 8, 2012
Namibian Astronomy Watching the skies from western Africa Wednesday, November 7, 2012
Dark Parks Unfettered views of the night sky Tuesday, November 6, 2012
Blue Night The night sky gets a little bluer Monday, November 5, 2012
R Trianguli Turmoil at the end of a star’s life Sunday, November 4, 2012
Triangulum Aging stars in the triangle Saturday, November 3, 2012
Multiple Blasts Multiple explosions from a single star Friday, November 2, 2012
Moon and Jupiter Cloudy skies on a giant planet Thursday, November 1, 2012
Halloween Star II A stellar cannibal for Halloween Wednesday, October 31, 2012
Halloween Star A two-headed stellar demon Tuesday, October 30, 2012
Mirfak The hero’s brightest star Monday, October 29, 2012
Aries II Taking the measure of a nearby star Sunday, October 28, 2012
Aries Moving the point of the vernal equinox Saturday, October 27, 2012
Tiny Black Hole A record-setting black hole Friday, October 26, 2012
Star Destroyer A star loses a life-and-death struggle Thursday, October 25, 2012
Gravitational Kick A black hole gets a big kick Wednesday, October 24, 2012
Summer Markers Two summer stalwarts disappear Sunday, October 21, 2012
Orionid Meteors A trail of lights from a messy comet Saturday, October 20, 2012
Shrinking Iceball A distant iceball gets smaller Friday, October 19, 2012
Moon and Companions Colorful companions for the Moon Thursday, October 18, 2012
White-Dwarf Planets II Dead stars consume dead planets Wednesday, October 17, 2012
White-Dwarf Planets Close planets around dead stars Tuesday, October 16, 2012
Celestial Equator Splitting the sky in half Monday, October 15, 2012
Deneb Algedi Deciphering the tale of an aging star Sunday, October 14, 2012
Bringing Up the Rear The tale of some starry tails Saturday, October 13, 2012
Capricornus The edge of the celestial sea Friday, October 12, 2012
Moon and Venus Long pauses in long-distance calls Thursday, October 11, 2012
Moon and Regulus Brightening up the Moon Wednesday, October 10, 2012
Dark Portrait Snapping a picture of the unseeable Tuesday, October 9, 2012
IC 10 A faint but busy galactic neighbor Monday, October 8, 2012
Faint Triplets A faint set of stellar triplets Sunday, October 7, 2012
Aquarius Life-giving waters from a faint constellation Saturday, October 6, 2012
European Southern Observatory Organizing a new observatory Friday, October 5, 2012
Moon and Jupiter A planet that’s a gravitational powerhouse Thursday, October 4, 2012
Zagami Meteorite A startling messenger from Mars Wednesday, October 3, 2012
More Venus and Regulus A well-timed early morning encounter Tuesday, October 2, 2012
Venus and Regulus Venus chugs past the heart of the lion Monday, October 1, 2012
Double Impact Bowling over a giant planet Sunday, September 30, 2012
Harvest Moon Celebrating the Mid-Autumn Moon Saturday, September 29, 2012
Uranus at Opposition Overlooking a giant planet Friday, September 28, 2012
Jovial Water Worlds Giant oceans around a giant planet Thursday, September 27, 2012
Water Worlds: Triton Squeezing out a global ocean Wednesday, September 26, 2012
Water Worlds: Titan A world with a really deep ocean Tuesday, September 25, 2012
Water Worlds Filling oceans on distant worlds Monday, September 24, 2012
The Horse’s Nose The flying horse’s bright nose Sunday, September 23, 2012
Moonwatching Moonlight on an autumn night Saturday, September 22, 2012
More Moon and Antares A stellar recycling project Friday, September 21, 2012
Moon and Antares Flirting with the stars Thursday, September 20, 2012
Moon and Mars Prime real estate on other worlds Wednesday, September 19, 2012
More Fomalhaut Cometary chaos around a young star Tuesday, September 18, 2012
Fomalhaut The lonely “Autumn Star” Monday, September 17, 2012
Moonless Nights The wonders of a moonless night Sunday, September 16, 2012
Hot Jupiters Clearing out a star system Saturday, September 15, 2012
BL Lacertae A star that’s more than a star Friday, September 14, 2012
Andromeda Starburst Brightening up a giant galaxy Thursday, September 13, 2012
Collision Course Taking aim at another galaxy Wednesday, September 12, 2012
Andromeda Galaxy A galactic twin in the evening sky Tuesday, September 11, 2012
Moon and Venus Drying out a wet planet Sunday, September 9, 2012
Moon and Ceres Peeking beneath the skin of an asteroid Saturday, September 8, 2012
Moon and Companions II Dipping our toes in a giant ocean Friday, September 7, 2012
Moon and Companions The stars foretell the weather Thursday, September 6, 2012
Gamma Cephei IV Getting messy for science Wednesday, September 5, 2012
Gamma Cephei III Keeping a planet on the table Tuesday, September 4, 2012
Gamma Cephei II A gnat’s eyelash and a distant planet Monday, September 3, 2012
Gamma Cephei The top of the king’s starry house Sunday, September 2, 2012
Seventh Month Miscounting the months Saturday, September 1, 2012
Dune Worlds Giant sand dunes on alien worlds Friday, August 31, 2012
Blue Moon A “colorful” astronomical rarity Thursday, August 30, 2012
Red Rivals Colorful rivals in the evening sky Wednesday, August 29, 2012
Arcturus Tracing a star’s origins Tuesday, August 28, 2012
Bear Watcher Keeping an eye on the big bear Monday, August 27, 2012
OSIRIS-Rex Studying a threatening space rock Sunday, August 26, 2012
Homeworld Security Tracking down threats from space Saturday, August 25, 2012
Dawn III Speeding toward a new target Friday, August 24, 2012
Dawn II Piecing together the story of an asteroid Thursday, August 23, 2012
Dawn A witness to the dawn of the solar system Wednesday, August 22, 2012
Moon and Companions A traffic jam in the evening sky Tuesday, August 21, 2012
Voyagers Beginning a voyage to the stars Monday, August 20, 2012
Eclipse Watcher Risking life and limb for a solar eclipse Sunday, August 19, 2012
Cloudy Skies A cruel twist of nature Saturday, August 18, 2012
Contact Binaries III A star system with a lot of variety Friday, August 17, 2012
Contact Binaries II Stirring up the family dynamics Thursday, August 16, 2012
Contact Binaries Stars that can’t let go Wednesday, August 15, 2012
Moon and Mercury Some interesting sunrises and sunsets Tuesday, August 14, 2012
Moon, Venus, Mercury Getting close to the Sun Monday, August 13, 2012
Moon and Venus A close encounter in the dawn sky Sunday, August 12, 2012
Perseid Meteors The perfect spot for the Moon Saturday, August 11, 2012
Moon, Jupiter, and Aldebaran The Moon takes a pounding Friday, August 10, 2012
M11 A flock of young stars Thursday, August 9, 2012
Mars, Saturn, and Spica A bright but rapidly closing triangle Wednesday, August 8, 2012
Moon Rising Inspiration from the rising Moon Tuesday, August 7, 2012
Dog Days Sweating through the Dog Days of summer Monday, August 6, 2012
Sky Crane A complicated landing for a complicated rover Sunday, August 5, 2012
Martian Nuke Powering up a Mars rover Saturday, August 4, 2012
Mars Tales A new visitor and an old myth Friday, August 3, 2012
Spinning Hearts The spinning hearts of giant stars Thursday, August 2, 2012
Cygnus X-1 A giant star vanishes from view Wednesday, August 1, 2012
Colorful Beak The swan’s colorful beak Tuesday, July 31, 2012
Cygnus A “snowbird” that heads west instead of south Monday, July 30, 2012
Equuleus Drawing up a little horse Sunday, July 29, 2012
Moon and Scorpius Scoping out a solar twin Friday, July 27, 2012
Steamy Sights Steamy sights in the southern sky Thursday, July 26, 2012
Moon and Spica Two bright stars for the price of one Wednesday, July 25, 2012
Moon and Planets Admiring the twilight on another world Tuesday, July 24, 2012
Future Beacons Lining up the North Stars Monday, July 23, 2012
Galactic Nests Keeping the chicks close to the nest Sunday, July 22, 2012
The Scorpion’s Tail The scorpion’s dynamic stinger Saturday, July 21, 2012
Alexandria A city — and a star — fit for a king Friday, July 20, 2012
Desert Storm A rain of stones from beyond Earth Thursday, July 19, 2012
Comet Swift-Tuttle A famous comet changes its image Wednesday, July 18, 2012
Tuttle Comets War, embezzlement, and comets Tuesday, July 17, 2012
Swift Comets From hardware-store owner to cosmic celebrity Monday, July 16, 2012
Summer Delights Bright delights in the summer sky Sunday, July 15, 2012
More Moon and Companions A sky show that’s worth getting up for Saturday, July 14, 2012
Moon and Companions A gathering of astronomical superstars Friday, July 13, 2012
Altairian Planets A star that gets a lot of attention Thursday, July 12, 2012
Altair A close and fast-moving neighbor Wednesday, July 11, 2012
More Vega The bright stars of the “ox boy” Tuesday, July 10, 2012
Vega A star that spins in a hurry Monday, July 9, 2012
Summer Triangle The brilliant Summer Triangle Sunday, July 8, 2012
H-R Diagram Drawing the lives of the stars Saturday, July 7, 2012
Venus and Aldebaran Bright and brighter in the dawn sky Friday, July 6, 2012
Faint But Steady Stars that are faint but long-lived Thursday, July 5, 2012
Distant Sun Slipping away from the Sun Wednesday, July 4, 2012
The Sombrero II Two galaxies for the price of one Tuesday, July 3, 2012
The Sombrero Looking beneath the brim of a galaxy Monday, July 2, 2012
The Ecliptic Following the path of the Sun Sunday, July 1, 2012
Moon and Antares Taking the measure of a jumbo star Saturday, June 30, 2012
In the Balance The Moon slips past the scorpion’s claws Friday, June 29, 2012
Zippy Planets Getting a big kick from a black hole Thursday, June 28, 2012
More Moon and Companions Turning on some far-away lamps Wednesday, June 27, 2012
Companions Companionship in the evening sky Tuesday, June 26, 2012
Moon and Mars Listening in to the Red Planet Monday, June 25, 2012
Delphinus The beautiful, graceful dolphin Sunday, June 24, 2012
Leo Minor Stars without much flash Saturday, June 23, 2012
Venus and Jupiter An encore performance in the dawn sky Friday, June 22, 2012
Moon and Mercury Peering into a small planet’s big heart Thursday, June 21, 2012
Summer Solstice Lining up the summer solstice Wednesday, June 20, 2012
Sun Tower A moment of sunlight without shadows Tuesday, June 19, 2012
Unproductive Sun Outshining the Sun — sort of Monday, June 18, 2012
Pipe Nebula Lighting up a dark nebula Sunday, June 17, 2012
Moon and Jupiter Swinging into the morning sky Saturday, June 16, 2012
Comet Exchange Stars exchange frozen leftovers Friday, June 15, 2012
Future Neighbor A future close neighbor to the Sun Thursday, June 14, 2012
Sun Power Weathering bouts of space weather Wednesday, June 13, 2012
Lunar Secrets New secrets from old moonrocks Tuesday, June 12, 2012
Back to the Moon(rocks) New discoveries from old rocks Monday, June 11, 2012
‘Milky’ Way The “milky” band of the Milky Way Sunday, June 10, 2012
Johann Galle Taking note of a new planet Saturday, June 9, 2012
Family Breakup A stellar family breaks up Friday, June 8, 2012
EUVE Opening a new “window” on the universe Thursday, June 7, 2012
Solar Spotters Getting a better bead on the Sun Wednesday, June 6, 2012
Venus Transit II A last-in-a-lifetime event Tuesday, June 5, 2012
Venus Transit Measuring out a solar-system ruler Monday, June 4, 2012
Partial Lunar Eclipse Taking a “bite” out of the Moon Sunday, June 3, 2012
Celestial Geometry A hubbub over celestial geometry Saturday, June 2, 2012
Transit and Eclipse Lining up with Earth and the Sun Friday, June 1, 2012
Moon, Spica, and Saturn Parsing the changes of the Moon Thursday, May 31, 2012
Double Heart Twin black holes in a nearby galaxy Wednesday, May 30, 2012
Hungry Black Hole A black hole that’s snacking on a star Tuesday, May 29, 2012
Moon, Mars, and Regulus Dark ice at the Moon’s poles Monday, May 28, 2012
Bear’s Nose The great bear’s shiny nose Sunday, May 27, 2012
The Keystone Four stars, four stories Friday, May 25, 2012
Hercules Cloud Piling up stars in the outer galaxy Thursday, May 24, 2012
Hercules Cluster A crowded “city” of stars Wednesday, May 23, 2012
Hercules Following the strongman across the sky Tuesday, May 22, 2012
Moon and Venus Sliding past the Moon and headed for the Sun Monday, May 21, 2012
Annular Eclipse II Cycling through centuries of eclipses Sunday, May 20, 2012
Happy Coincidence A beautiful scientific coincidence Friday, May 18, 2012
Clockwork Eclipses Ticking off the hours until a solar eclipse Thursday, May 17, 2012
Making Mirrors Making the hearts of giant telescopes Tuesday, May 15, 2012
Giant Magellan Telescope A new “giant” eye on the universe Monday, May 14, 2012
Primordial Clouds Relics of the birth of the universe Sunday, May 13, 2012
Serpens Piecing together a celestial snake Saturday, May 12, 2012
Wobbly Clocks Listening for cosmic “ripples” Friday, May 11, 2012
Gravity Probe B Putting a spin on space itself Thursday, May 10, 2012
Luna See Firing a laser at the Moon Wednesday, May 9, 2012
Relativity and GPS Keeping track of the entire world Tuesday, May 8, 2012
General Relativity Albert Einstein “warps” the universe Monday, May 7, 2012
Moving Clouds Clouds that move with the seasons Sunday, May 6, 2012
Humid Skies Measuring the humidity on a cold world Saturday, May 5, 2012
More Moon and Companions A warm blanket on a frigid moon Friday, May 4, 2012
Moon and Companions Floating through an alien sky Thursday, May 3, 2012
Titan Cold rains and dark lakes on a chilly world Wednesday, May 2, 2012
Moon and Mars Crowded skies above the Moon Tuesday, May 1, 2012
Moon, Mars, and Regulus Uncovering the secrets of a star Monday, April 30, 2012
Centaurus A A galaxy with a loud voice Sunday, April 29, 2012
Brilliant Venus Lighting up the “evening star” Saturday, April 28, 2012
Capella A quick exit for a “heavy” star Friday, April 27, 2012
Ranger 4 Slamming into the far side of the Moon Thursday, April 26, 2012
Vanishing Lights Ready for a stellar vanishing act Wednesday, April 25, 2012
Moon and Venus Resetting the clocks on Venus Tuesday, April 24, 2012
Moon and Taurus Snapping the universe -- from the Moon Monday, April 23, 2012
Moon and Jupiter A giant planet’s disappearing heart Sunday, April 22, 2012
Apollo 16 Fun and science on the lunar surface Saturday, April 21, 2012
Black Hole Power Getting power from a black hole Friday, April 20, 2012
Looking for ET Looking for signs of alien visitors Thursday, April 19, 2012
Warp Drive Engaging the warp drive Wednesday, April 18, 2012
New Ideas New ideas for exploring the universe Tuesday, April 17, 2012
Mercury in the Morning Teasing out a view of Mercury Monday, April 16, 2012
More Saturn at Opposition Dabs of color in the night sky Sunday, April 15, 2012
Saturn at Opposition Looking back toward home Saturday, April 14, 2012
Star in a Bottle Making a bottleful of starstuff Friday, April 13, 2012
Cosmic Clocks The ticking of cosmic clocks Thursday, April 12, 2012
White Dwarf Quakes Stars that “quake” in the night Wednesday, April 11, 2012
Little Dwarfs The smallest white-dwarf stars Tuesday, April 10, 2012
Venus and Aldebaran The demise of a star and planet Sunday, April 8, 2012
Balloon Ride Taking a balloon ride for science Saturday, April 7, 2012
Moon, Saturn, and Spica Bracketing the horn of the dragon Friday, April 6, 2012
Double Sunsets Double sunsets on alien worlds Thursday, April 5, 2012
Snow Line A solar system’s best spot for skiing Wednesday, April 4, 2012
Making Venuses A “stretchy” way to heat a planet Tuesday, April 3, 2012
Moon, Mars, and Regulus Different pinpoints of light Monday, April 2, 2012
Venus and Pleiades The evening star and the littler dipper Sunday, April 1, 2012
Storm Season Stirring up cold fronts on Mars Saturday, March 31, 2012
Summertime The good old summertime Friday, March 30, 2012
Snack Time Snack time for a giant black hole Thursday, March 29, 2012
Black Hole Bullets Bullets of hot gas from a black hole Wednesday, March 28, 2012
Multi-Messenger Astronomy Notes from different messengers Tuesday, March 27, 2012
Saturnian Encounters A busy week of moon-hopping Monday, March 26, 2012
Moon, Jupiter, and Venus A brilliant lineup in the evening sky Saturday, March 24, 2012
Alien Clusters Alien visitors from other galaxies Friday, March 23, 2012
Galactic Streams Blending into the Milky Way Thursday, March 22, 2012
Sagittarius Dwarf A galactic tug-of-war Wednesday, March 21, 2012
Satellite Galaxies Satellite galaxies for the Milky Way Tuesday, March 20, 2012