Grades 3-5 (Ages 8-10)



Jupiter's Moons Jupiter has 62 known moons. The four Galilean...
Meteorites To the people of L'Aigle, France, it must have...
Asteroids At the dawn of the 19th century, a group of...
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...
Mars Mars inspires speculation like no other world in...
Mercury Tiny, cratered Mercury is the closest planet to...

Radio Programs

The Whole Gang The worlds of the solar system Monday, February 1, 2016
Moon and Jupiter A big moon takes a beating Tuesday, January 26, 2016
Moon and Mars Lighting up the waning Moon — after this. Saturday, January 2, 2016
New Year’s Sky A grand view for a new year Thursday, December 31, 2015
Christmas Moon Lighting up the night Friday, December 25, 2015
Long-Night Moon Rudolph gets the night off Thursday, December 24, 2015
New Pluto A new view of a distant world Tuesday, December 22, 2015
Moon and Companions Bright companions for the Moon Saturday, December 5, 2015
Moon and Mars A frozen treat on the Red Planet Friday, December 4, 2015
Wet Skies “Wet” stars in the southern sky Wednesday, November 18, 2015
John Stanley Plaskett Taking the measure of the Milky Way Tuesday, November 17, 2015
Halloween Haunting stars in the evening sky Saturday, October 31, 2015
Hunter’s Moon Marking time with the Hunter’s Moon Monday, October 26, 2015
Close Visitors Keeping an eye out for trouble Saturday, October 17, 2015
Mars and Jupiter A close call in the morning sky Thursday, October 15, 2015
Uranus at Opposition A good showing for “George’s Star” Sunday, October 11, 2015
Morning Mercury A dark planet in the dawn sky Saturday, October 10, 2015
Moon and More Companions Filling up a Martian crater Thursday, October 8, 2015
Weekend Goodies A great weekend for skywatching Friday, September 25, 2015
Morning Lineup Bright lights in the dawn sky Thursday, September 24, 2015
North vs. South Different views of the night sky Sunday, September 20, 2015
John Dobson Bringing telescopes to the masses Monday, September 14, 2015
Moon, Venus, and Mars Ancient Mars cools off Wednesday, September 9, 2015
Zenith Looking straight up Monday, September 7, 2015
First Professor Ready for the first day of class Wednesday, September 2, 2015
Venus and Mars Prominent neighbors in the dawn sky Tuesday, September 1, 2015
Neptune at Opposition II Cranking up the winds on a distant planet Monday, August 31, 2015
Neptune at Opposition Neptune in the sky with diamonds Sunday, August 30, 2015
Shergotty A piece of Mars falls from the sky Tuesday, August 25, 2015
Iron Rain Showering Earth with iron raindrops Tuesday, August 18, 2015
Moon and Uranus Pointing out a neglected giant Tuesday, August 4, 2015
Blue Moon Modern folklore about the night sky Thursday, July 30, 2015
More Charles Townes Shining a new light on the universe Wednesday, July 29, 2015
Charles Townes Dreaming up a laser beam Tuesday, July 28, 2015
Moon and Companions Getting ready to change addresses Saturday, July 18, 2015
Pluto A famous but poorly understood world Tuesday, July 7, 2015
Fireworks Fireworks in the evening sky Saturday, July 4, 2015
Venus and Jupiter Identifying two evening skylights Thursday, July 2, 2015
Short Moon A short night of moonwatching Wednesday, July 1, 2015
Bright Trios A pair of trios in the evening sky Monday, June 29, 2015
Venus and Jupiter Bright planets in the evening sky Friday, June 26, 2015
More Fred Hoyle Scientist, writer, contrarian Thursday, June 25, 2015
Fred Hoyle Unlocking the secrets of the stars Wednesday, June 24, 2015
Moon and Jupiter Plunging into a hidden ocean Saturday, June 20, 2015
Martian Spring Wild seasons on the Red Planet Thursday, June 18, 2015
Oceans Gained Filling up Earth’s oceans Friday, June 5, 2015
Ocean Lost A massive ocean on the planet Mars Thursday, June 4, 2015
Moon and Companions Bright lights in the evening sky Friday, May 22, 2015
Moon and Saturn Optical illusions in the night sky Monday, May 4, 2015
Rock Fight Fighting over a rock from space Saturday, May 2, 2015
Moon and Spica Creeping up on a bright star Friday, May 1, 2015
Evening Mercury Measuring a planetary day Sunday, April 26, 2015
Meteorites III Picking up some unusual rocks Sunday, April 19, 2015
Meteorites II Measuring the age of the solar system Saturday, April 18, 2015
Meteorites Rare treasures from beyond Earth Friday, April 17, 2015
Moon and Jupiter Dipping into a giant hot tub Sunday, March 29, 2015
Moon in the Middle Passing through a bright triangle Saturday, March 28, 2015
Moon and Mars Warming up a cold planet Saturday, March 21, 2015
Moon and Jupiter Adding color to a giant planet Monday, March 2, 2015
Double Double A double double in the evening sky Saturday, February 21, 2015
Celestial Equator Splitting the night sky in half Saturday, January 31, 2015
Moon and Mars Asteroids take aim at Mars Thursday, January 22, 2015
Venus and Mercury Pointing the way to a little planet Saturday, January 10, 2015
Robert Aitken An astronomer who saw double Wednesday, December 31, 2014
Moon, Mars, and Venus Bright lights in the early evening Thursday, December 25, 2014
Moon and Mars Flickering images of a famous world Wednesday, December 24, 2014
Mars at Perihelion Mars gets close to the Sun Saturday, December 13, 2014
Disappearing Triangle A holdover from summer skies Saturday, December 6, 2014
Moon and Uranus The Moon takes aim at a faint giant Monday, December 1, 2014
Rara Avis Rare birds in southern skies Saturday, November 29, 2014
Moon and Mars Jet lag after a long trip Tuesday, November 25, 2014
Halloween A dark and lonely night in the dome Friday, October 31, 2014
Moon and Mars The planet Mars runs in place Monday, October 27, 2014
Close to Mars An icy relic takes aim at Mars Thursday, October 16, 2014
Uranus at Opposition Lining up a giant oddball Monday, October 6, 2014
Daniel Kirkwood Explaining bands of nothing Friday, September 26, 2014
MAVEN Probing Mars’s escaping atmosphere Sunday, September 21, 2014
Moon and Jupiter The heat of a twisted moon Friday, September 19, 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
Neptune at Opposition Lining up a blue-green giant Wednesday, August 27, 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
Anders Angstrom Scanning the “barcode” of the Sun Wednesday, August 13, 2014
Moon and Mars Coloring the Martian sky Saturday, August 2, 2014
Asteroid Hunting Pointing the way to two asteroids Sunday, July 13, 2014
Moon, Mars, and Spica A close but wide-spread trio Saturday, July 5, 2014
Moon and Jupiter Watching the twilight fade away Sunday, June 29, 2014
Lyman Spitzer Probing matter between the stars Wednesday, June 25, 2014
Summer Triangle Bright stars shine through the moonlight Friday, June 13, 2014
Cosmic Hailstones Telling tales of space rocks Thursday, June 12, 2014
More Moon and Mars A planetary deepfreeze Saturday, June 7, 2014
Moon and Mercury Ghostly apparitions in the evening sky Friday, May 30, 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
Moon and Jupiter Big geysers on big moons Saturday, May 3, 2014
Changing Skies Seeing through the moonlight Friday, April 18, 2014
North Galactic Pole Gazing away from the Milky Way Saturday, April 12, 2014
Mars at Opposition III The hazards of living on Mars Wednesday, April 9, 2014
Mars at Opposition Snuggling fairly close to Mars Monday, April 7, 2014
Moon in the Middle Bright stars packed around the Moon Saturday, April 5, 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
Yakov Zel’dovich From exploding bombs to exploding stars Saturday, March 8, 2014
Moon and Companions Quartering the Moon Friday, February 21, 2014
Evening Mercury The wrinkled skin of a small planet Friday, January 31, 2014
Morning Planets Lining up some early morning planets Sunday, January 26, 2014
Moon and Mars Taking a trip to Mars Tuesday, January 21, 2014
Morning Planets Bright planets in the dawn sky Friday, January 17, 2014
Moon in the Middle Boxing in the gibbous Moon Sunday, January 12, 2014
Earth Impacts V Protecting Earth from space rocks Friday, January 10, 2014
Quadrantid Meteors Looking for the parent of a meteor shower Thursday, January 2, 2014
Midnight Stars Celebrating with the stars Sunday, December 29, 2013
Star Songs Tuning in to the stars Friday, December 20, 2013
Long-Night Moon Filling the night with moonlight Monday, December 16, 2013
Super Origins A refugee from the planet Krypton Saturday, December 14, 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
Mars Companions Distant companions for the Red Planet Sunday, December 1, 2013
MAVEN The disappearing Martian air Sunday, November 17, 2013
Antarctic Adventures Ice, rocks, and other worlds Monday, November 11, 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
Moon and Mars A comfortable planetary neighbor Monday, October 28, 2013
Tail Stars The back ends of two constellations Wednesday, October 23, 2013
Moon and Aldebaran Peeking through the moonlight Monday, October 21, 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
Uranus at Opposition Pondering some “giant” mysteries Tuesday, October 1, 2013
Moon and Companions Warming up a Martian hemisphere Monday, September 30, 2013
Harvest Moon Harvesting some extra moonlight Wednesday, September 18, 2013
Winter Preview Taking a sneak peek at winter Sunday, September 15, 2013
A Tale of Two Skies Taking a spin on a merry-go-round Tuesday, September 10, 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
Neptune at Opposition Probing deep into a planet’s atmosphere Monday, August 26, 2013
Moon, Spica, and Meteors A double feature in the night sky Sunday, August 11, 2013
Water Carriers Starry vessels in the midnight sky Thursday, August 8, 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
Venus and Regulus A fairy tale in the evening sky Saturday, July 20, 2013
Bookends Bookending morning and evening skies Friday, July 19, 2013
Solar Highway Following the path of the Sun Friday, July 12, 2013
Delphinus Sneaking into astronomical history Monday, July 8, 2013
Sky Test A test for dark night skies Sunday, June 30, 2013
Maximilian Wolf Snapping pictures of the night sky Saturday, June 22, 2013
Evening Treats Highlights of the evening sky Tuesday, June 18, 2013
Mercury Rising Cold pockets on a hot planet Tuesday, May 28, 2013
Soothing Moon Stirring up some epsom salts Sunday, May 26, 2013
Evening Planets Celestial theater in the evening sky Saturday, May 25, 2013
Moon and Spica A small but vast astronomical gap Tuesday, May 21, 2013
Moon and Regulus Lining up some bright moonlight Friday, May 17, 2013
Nicolas Louis de Lacaille Mapping southern skies Wednesday, May 15, 2013
Moon and Jupiter A bright trio in the evening sky Saturday, May 11, 2013
Sutter’s Mill A new strike at Sutter’s Mill Tuesday, April 23, 2013
Moon and Regulus A special day for astronomy Saturday, April 20, 2013
Time and Navigation A helpful device for seeing the world Thursday, April 11, 2013
Moon and Companions The Moon slides across the sky Sunday, March 17, 2013
Capistrano Meteorite A California town gets a visitor Friday, March 15, 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
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 A target in a cosmic shooting gallery Monday, February 11, 2013
Grand Sky A “grand” view of the night sky Saturday, February 2, 2013
Winter Circle Bracketing the Winter Circle Saturday, January 26, 2013
Apophis Keeping an eye on a troublemaker Tuesday, January 8, 2013
Holiday Skies Lighting up the holiday sky Monday, December 31, 2012
Long-Night Moon Lighting up the long night Thursday, December 27, 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
Moon and Mars Visitors from other worlds Saturday, December 15, 2012
Moon and Jupiter A chilly Moon for a chilly time of year Wednesday, November 28, 2012
Celestial Equator Splitting the sky in half Monday, October 15, 2012
Zagami Meteorite A startling messenger from Mars Wednesday, October 3, 2012
Double Impact Bowling over a giant planet Sunday, September 30, 2012
Uranus at Opposition Overlooking a giant planet Friday, September 28, 2012
Moonless Nights The wonders of a moonless night Sunday, September 16, 2012
Blue Moon A “colorful” astronomical rarity Thursday, August 30, 2012
Red Rivals Colorful rivals in the evening sky Wednesday, August 29, 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
Eclipse Watcher Risking life and limb for a solar eclipse Sunday, August 19, 2012
Perseid Meteors The perfect spot for the Moon Saturday, August 11, 2012
Mars, Saturn, and Spica A bright but rapidly closing triangle Wednesday, August 8, 2012
Moon and Spica Two bright stars for the price of one Wednesday, July 25, 2012
Desert Storm A rain of stones from beyond Earth Thursday, July 19, 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
More Vega The bright stars of the “ox boy” Tuesday, July 10, 2012
Distant Sun Slipping away from the Sun Wednesday, July 4, 2012
The Ecliptic Following the path of the Sun Sunday, July 1, 2012
Venus and Jupiter An encore performance in the dawn sky Friday, June 22, 2012
Moon and Jupiter Swinging into the morning sky Saturday, June 16, 2012
Johann Galle Taking note of a new planet Saturday, June 9, 2012
Celestial Geometry A hubbub over celestial geometry Saturday, June 2, 2012
Moon, Spica, and Saturn Parsing the changes of the Moon Thursday, May 31, 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
Clockwork Eclipses Ticking off the hours until a solar eclipse Thursday, May 17, 2012
Brilliant Venus Lighting up the “evening star” Saturday, April 28, 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 Jupiter A giant planet’s disappearing heart Sunday, April 22, 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
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
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
Rings of Uranus A dark discovery for a giant planet Thursday, March 8, 2012
Double Treat A double treat in the evening sky Wednesday, March 7, 2012
Moon, Mars, and Leo A bold alignment in the night sky Tuesday, March 6, 2012
Evening Mercury Rethinking the birth of a planet Monday, March 5, 2012
Moon and Taurus The Moon and two stellar families Tuesday, February 28, 2012
Moon and Planets An impressive display in the evening sky Friday, February 24, 2012
Friendship 7 Getting back in the Space Race Monday, February 20, 2012
Moon and Companions Zipping past a giant planet Saturday, February 11, 2012
Dueling Dippers Stirring up the starry night sky Friday, February 10, 2012
The Big Dog Biting into a bright constellation Sunday, January 29, 2012
Brightest Lights Cutting off a slice of the sky Saturday, January 21, 2012
More Moon and Mars Scaling the heights of Mars Friday, January 13, 2012
Moon and Mars Watery oases on a desert world Thursday, January 12, 2012
Moon and Hyades Staring into the face of the bull Thursday, January 5, 2012
The New Year Bringing the calendar to heel Sunday, January 1, 2012
New Year’s Eve Sky A celestial greeting for the new year Saturday, December 31, 2011
Northern Cross Holding together a stellar cross Sunday, December 25, 2011
The Reindeer An extra reindeer for Santa’s sleigh Saturday, December 24, 2011
Saturnalia A modern celebration with old customs Saturday, December 17, 2011
Race to the Pole Racing for the south pole Wednesday, December 14, 2011
Menkalinan The charioteer’s double-jointed shoulder Sunday, December 4, 2011
Fire and Water Fire and water in the night sky Saturday, December 3, 2011
Rarae Aves Rare birds in southern skies Monday, November 28, 2011
Orion Rising The return of an astronomical beauty Sunday, November 20, 2011
Moon and Companions Spacing out a morning lineup Thursday, November 17, 2011
Mercury and Venus Close neighbors in the evening sky Friday, November 11, 2011
More Moon and Jupiter Warming up a giant planet Wednesday, November 9, 2011
Moon and Jupiter Powering up a distant aurora Tuesday, November 8, 2011
Daylight Saving Time Stepping back in time Sunday, November 6, 2011
Venus Returns The return of the “evening star” Friday, October 28, 2011
Moon and Mars Strolling on alien worlds Thursday, October 20, 2011
More Moon and Jupiter Painting a bullseye on a moon Thursday, October 13, 2011
Uranus at Opposition Diving into an icy planet Sunday, September 25, 2011
Doomed Moons Recycling on a giant scale Saturday, September 24, 2011
Moon and Mars Twin moons under alien skies Thursday, September 22, 2011
Moon and Aldebaran Looking at the Sun’s bright future Sunday, September 18, 2011
More Moon and Jupiter Reflections on an icy moon Friday, September 16, 2011
Moon and Jupiter An ancient god and the modern calendar Thursday, September 15, 2011
Serpens Splitting up a faint constellation Wednesday, September 14, 2011
Harvest Moon Balancing the Harvest Moon Sunday, September 11, 2011
Mercury and Regulus An early morning duo Thursday, September 8, 2011
Watching Earthshine Watching the dark side of the Moon Monday, September 5, 2011
Morning Mercury A confusing planet in the morning sky Friday, September 2, 2011
Evening Lineup A powerful early-season storm Wednesday, August 31, 2011
Neptune at Opposition Pulverizing a Neptunian moon Monday, August 22, 2011
Glass Astronomy Astronomy-under-glass Tuesday, August 16, 2011
Perseid Meteors Drowning out a fading shower Friday, August 12, 2011
Moon and Antares A star that's redder than red Sunday, August 7, 2011
Juno Looking into the heart of a giant Monday, August 1, 2011
Moon and Mars Greening up the Red Planet Monday, June 27, 2011
Scutum Shielding a new constellation Sunday, June 26, 2011
More Moon and Jupiter The solar system's 800-pound gorilla Saturday, June 25, 2011
Moon and Jupiter Changing concepts of a giant world Friday, June 24, 2011
Moon and Companions Stars and planets move apart Friday, June 10, 2011
Transit of Venus One year away from a rare event Sunday, June 5, 2011
Moon and Stars Following the leader in the evening sky Saturday, June 4, 2011
More Moon and Jupiter Cutting through the static Sunday, May 29, 2011
More Moon and Venus A traffic jam in the dawn sky Saturday, April 30, 2011
Watery Mars Divining for water on Mars Thursday, April 14, 2011
First-Quarter Moon Half a Moon equals a quarter Monday, April 11, 2011
Taking Inventory II Watching for invaders from beyond Sunday, March 27, 2011
Mercury and Jupiter Big and small in the evening sky Monday, March 14, 2011
Urbain Leverrier A "calculated" planetary discovery Friday, March 11, 2011
Moon and Jupiter Grand names for a grand planet Sunday, March 6, 2011
More Moon and Venus Nighttime objects in the daytime sky Monday, February 28, 2011
Moving Dipper A stellar family spreads out Friday, February 25, 2011
Changing Skies Looking forward to the Big Handivac Thursday, February 24, 2011
Dubhe Skies as different from ours as night and day Wednesday, February 23, 2011
Alkaid The "leading" star of the Big Dipper Tuesday, February 22, 2011
Moon and Jupiter A delayed trip to the Moon Sunday, February 6, 2011
Celestial Clock Ticking off the hours of the night Monday, January 31, 2011
Johannes Hevelius Filling in some gaps in the sky Saturday, January 29, 2011
Venus and Antares A deceptive morning duo Saturday, January 22, 2011
Moon and Regulus The stars turn across the night sky Friday, January 21, 2011
Moon and Jupiter Preventing alien contamination Sunday, January 9, 2011
Quadrantid Meteors Tracers of a bygone constellation Sunday, January 2, 2011
Jupiter and Uranus Two giants passing in the night Saturday, January 1, 2011

Featured Images

Planets in the dawn sky, February 2016
The Whole Gang Sunday, January 31, 2016
Morning alignment of planets, January 2016
Five in a Row Sunday, January 24, 2016
Radio view of asteroid 2015 TB145, which will pass close to Earth on Halloween
Boo! Saturday, October 31, 2015
View of Mercury from Messenger spacecraft
Dark Planet Saturday, October 10, 2015
Moon and companions
Morning Array Wednesday, October 7, 2015
Backlit view of Pluto landscape from New Horizons
Hazy Skies Tuesday, September 22, 2015
New Horizons view of young mountains on Pluto
Ice Mountains Wednesday, July 15, 2015
July 12 views of Charon and Pluto from New Horizons
Hours Away Monday, July 13, 2015
First Eyes on Mars Monday, July 13, 2015
New Horizons view of Pluto and Charon, July 1, 2015
Best Shot Tuesday, July 7, 2015
Encounter between Venus and Jupiter, July 2015
Planetary Headlights Thursday, July 2, 2015
Views of the Venus-Jupiter evening encounter, June 26-July 4, 2015
Brilliant Encounter Friday, June 26, 2015
A mosaic of spacecraft images shows the varied surface of Ganymede
Hiding an Ocean Saturday, June 20, 2015
Sunset at Gale Crater, Mars, April 2015
Blue Skies Thursday, May 14, 2015
Artist's concept of Earth's distant future
Bright Future Wednesday, April 29, 2015
View of Loki Patera, a lake of molten rock on Io, a moon of Jupiter
Hot Lake Sunday, March 29, 2015
Curiosity rover view of rock layers inside Gale Crater on Mars
Ancient Lakebed Tuesday, December 9, 2014
Hubble Space Telescope view of Uranus
Tilted Giant Monday, October 6, 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
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
Europa orbiter mission concept
Fresh Idea Thursday, July 3, 2014
Hubble views of Jupiter's Great Red Spot
Shrinking Storm Thursday, May 15, 2014
Views from the 1964 World's Fair
Space Fair Tuesday, April 22, 2014
Artist's concept of early morning fog, clouds, and frost on Mars
Morning Fog Tuesday, April 8, 2014
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
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
Hubble Space Telescope view of planet Uranus
Blue-Green Giant Tuesday, October 1, 2013
Composite Galileo image of Jupiter's volcanic moon Io
Jovian Adventure Friday, August 30, 2013
Eastern dawn sky, early August 2013
Morning Jam Friday, August 2, 2013
Kasei Valles, an ancient flood channel on Mars
Ancient Flood Monday, June 10, 2013
Planetary conjunction, May 2013
Evening Traffic Jam Saturday, May 25, 2013
Supercomputer simulations of Earth's magnetic field
Twist and Flip Monday, April 8, 2013
The starry ceiling of Grand Central Terminal
Grand Sky Saturday, February 2, 2013
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
First-quarter Moon
Moonwatch Saturday, September 22, 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
Solar eclipse of August 19, 1887, from near Berlin
Fire in the Sky Saturday, August 18, 2012
Moon and Companions, June 2012
Moon and Company Monday, June 25, 2012
An ultraviolet camera gazes skyward from the Moon during the Apollo 16 mission
Looking Up Monday, April 23, 2012
Water geysers from the south pole of Enceladus, a moon of Saturn
Leaking Moon Monday, March 26, 2012
Venus and Jupiter pass each other in the evening sky, March 10-14, 2012
Celestial Headlights Saturday, March 10, 2012
Mars is at opposition in early March 2012, shining brightest for the year
Mighty Mars Saturday, March 3, 2012
John Glenn enters his Mercury capsule (right), and launches on February 20, 1962
Up, Up, and Away! Monday, February 20, 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
Galileo spacecraft mosaic of Ganymede, largest moon of Jupiter
Two-Toned Moon Monday, December 5, 2011
Phoenix and Grus in the southern sky, late November evening
Rare Birds Monday, November 28, 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
Messenger view of Mercury's southern hemisphere
Hard-to-Study Planet Friday, September 2, 2011
Moon, Mars, and Aldebaran, July 26-28, 2011
Seeing Orange Monday, July 25, 2011
Delta Lyrae and the Summer Triangle
Seeing Double Sunday, July 10, 2011
Moon and planets in the dawn sky, April 30/May 1, 2011
Dawn Encounter Friday, April 29, 2011
Image of water distribution in northern hemisphere of Mars
Watery Mars Thursday, April 14, 2011
MESSENGER's first color image of Mercury, March 29, 2011
First Glimpse Thursday, March 31, 2011
Mercury and Jupiter passing in the evening sky
Just Passing By Sunday, March 13, 2011
Apollo 14 commander Alan Shepard poses with the American flag on the Moon
Long Journey Sunday, February 6, 2011
Western sky a couple of hours after sunset in late December
Happy Holidays! Saturday, December 25, 2010
Two planets and a star team up with the crescent Moon in the western evening sky
Moon and Companions Friday, September 10, 2010
A thick dust storm blows across Mars in this image from Mars orbit.
Dusty Skies Monday, July 12, 2010
Western Lineup Sunday, June 27, 2010
Rings and Moons
Rings and Moons Friday, June 4, 2010
Big Blue Planet
Big Blue Planet Tuesday, June 1, 2010


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