You are here

History

Resources

Pluto February 19, 2016

Earth’s Moon February 19, 2016

Venus

Venus February 10, 2016

Ongoing Explorations March 3, 2014

Virgo, the virgin

Virgo October 4, 2011

Aquarius

Aquarius October 4, 2011

Cancer, the Crab

Cancer, the Crab October 4, 2011

Libra, the Scales

Libra, the Scales October 4, 2011

Pisces, the fish

Pisces, the Fish October 4, 2011

Aries, the ram

Aries, the Ram October 4, 2011

Facts and Figures June 10, 2010

Realm of the Giants June 10, 2010

Star Party On! June 3, 2010

Gemini, the Twins

Gemini, the Twins May 25, 2010

Taurus, the Bull

Taurus, the Bull May 25, 2010

Rings encircle a young planet in this artist's concept.

Exoplanets May 21, 2010

Equipment Tips May 14, 2010

What to Look For May 14, 2010

Become a Stargazer April 14, 2010

Explorations in 2009 January 7, 2009

A giant plume of hot gas explodes from the Sun's surface. Giant bubbles of hot g

Our Star, the Sun June 8, 2006

Radio Programs

Leap Day Leaping with the seasons February 29, 2016

Mars on Earth Getting ready for Mars February 27, 2016

More Plutonium Powering up trips to deep space February 25, 2016

New Names New names for a family of planets February 19, 2016

Arrow of Time Going forward in time February 16, 2016

Moon and Companions Two planets without moons February 5, 2016

Moon and Venus A “liquid” atmosphere for Venus February 4, 2016

Luna 9 The first soft landing on the Moon February 3, 2016

The Whole Gang The worlds of the solar system February 1, 2016

Moon and Spica Filling a lunar “ocean” January 29, 2016

Auriga The charioteer’s bright shoulders January 24, 2016

Zapped! Zapped by the Sun — twice January 18, 2016

Moon and Companions Building a mound on the Moon — after this. January 6, 2016

Moon and Venus Dropping in on a nasty planet January 5, 2016

Tau Ceti Visiting a dusty star system — after this. January 4, 2016

Moon and Mars Lighting up the waning Moon — after this. January 2, 2016

New Year’s Sky A grand view for a new year December 31, 2015

Going Long Getting to the stars in a hurry December 29, 2015

Going Small Small plans for space exploration December 28, 2015

New Pluto A new view of a distant world December 22, 2015

El Nath Sharing a bright star December 20, 2015

Meeting in Space A meet-and-greet in space December 15, 2015

Breaking Down Breaking down lunar soil December 13, 2015

Astro-1 Astronomy from a cargo bay December 8, 2015

Moon and Companions Bright companions for the Moon December 5, 2015

Venus and Mars Planets huddle close in the dawn sky November 1, 2015

Moon and Aldebaran Patiently watching the bull’s eye October 29, 2015

Venus and Jupiter A great show from the “morning star” October 22, 2015

Morning Trio The first look at a hidden landscape October 21, 2015

Mars and Jupiter A close call in the morning sky October 14, 2015

Tau Ceti De-populating a popular star system October 13, 2015

Hot Planet A world you wouldn’t want to visit October 12, 2015

51 Pegasi A puffy planet gets some attention October 11, 2015

Triangulum Galaxy A busy member of the Local Group October 5, 2015

Big Story A big-screen story in the autumn sky September 27, 2015

Weekend Goodies A great weekend for skywatching September 24, 2015

Morning Lineup Bright lights in the dawn sky September 23, 2015

North vs. South Different views of the night sky September 19, 2015

Moon and Antares Ticking off the hours of the night September 18, 2015

John Dobson Bringing telescopes to the masses September 13, 2015

Moon and Venus Beauty and fire in the dawn sky September 7, 2015

Zenith Looking straight up September 6, 2015

First Professor Ready for the first day of class September 1, 2015

Venus and Mars Prominent neighbors in the dawn sky August 31, 2015

Hunting Planets IV Patiently looking for planets August 28, 2015

Hunting Planets III Looking for big, cold planets August 27, 2015

Hunting Planets II More nights hunting for planets August 26, 2015

Hunting Planets Getting ready to hunt planets August 25, 2015

Gemini 5 Powering up for a trip to space August 22, 2015

Changing Addresses Venus moves to the morning sky August 14, 2015

More Charles Townes Shining a new light on the universe July 28, 2015

Charles Townes Dreaming up a laser beam July 27, 2015

Moon and Spica Frozen in place in lunar skies July 21, 2015

Moon and Companions Getting ready to change addresses July 17, 2015

More Mariner 4 Changing the concept of Mars July 13, 2015

Mariner 4 Getting the first good look at Mars July 12, 2015

Pluto A famous but poorly understood world July 6, 2015

Fireworks Fireworks in the evening sky July 3, 2015

Venus and Jupiter Identifying two evening skylights July 1, 2015

Leap Second Stretching out the month of June June 29, 2015

Bright Trios A pair of trios in the evening sky June 28, 2015

Venus and Jupiter Bright planets in the evening sky June 25, 2015

More Fred Hoyle Scientist, writer, contrarian June 24, 2015

Fred Hoyle Unlocking the secrets of the stars June 23, 2015

Moon and Venus Losing our eyes and ears on Venus June 18, 2015

Doomed Planets Planets with limited lifetimes June 11, 2015

Day and Night Day and night on distant planets June 10, 2015

Exoplanets An astounding variety of planets June 8, 2015

Gemini 4 Floating into the history books June 2, 2015

Moon and Antares Digging up some lunar history June 1, 2015

Moon in Balance Bringing a constellation into balance May 30, 2015

Moon and Jupiter Jupiter loses its status May 22, 2015

Moon and Companions Bright lights in the evening sky May 21, 2015

Moon and Venus The “evening star” slows down May 20, 2015

Saturn at Opposition III Drawing rings around a giant planet May 19, 2015

The Crow A confusing layout for a faint constellation May 16, 2015

Hercules Handing down pictures of the stars May 10, 2015

Bear’s Nose The shiny nose of the great bear May 9, 2015

Moon and Saturn Optical illusions in the night sky May 3, 2015

El Nath Location, location, location May 2, 2015

Moon and Spica Creeping up on a bright star April 30, 2015

Solar Nap The Sun takes a long nap April 29, 2015

Unpredictable Sun Predicting our unpredictable Sun April 28, 2015

Brighter Sun The Sun gets a lot brighter April 27, 2015

Solar Fusion The Sun shines on and on and on April 26, 2015

Moon and Venus Double “smacks” for a young planet April 20, 2015

Venus and Aldebaran Battle of the sexes in the evening sky April 14, 2015

The Search Continues The search for planets continues April 12, 2015

Twin Monsters Giving life to a classic story April 4, 2015

Moon in the Middle Passing through a bright triangle March 27, 2015

Moon and Venus Shaking up the solar system March 21, 2015

Small Steps Small steps in the exploration of space March 17, 2015

Moon, Saturn, and Antares Heating up the Moon’s interior March 11, 2015

Seeing the Past Looking at the solar system’s past February 28, 2015

Double Double A double double in the evening sky February 20, 2015

Triple Play II Two very different neighbors February 19, 2015

Solar Max Taking a look at the busy Sun February 13, 2015

Moon and Regulus Settling the dust on the Moon February 3, 2015

More Moon and Jupiter The Moon stays active February 2, 2015

Brackets Bright lights bracket the evening sky January 31, 2015

Moon and Venus Venus’s nightside goes green January 20, 2015

Binary Planets Two planets for the price of one January 19, 2015

Moon and Companions A brilliant presence in the night sky January 15, 2015

Moon and Jupiter Closing in on two dwarf planets January 6, 2015

Close to the Sun Snuggling close to the Sun January 2, 2015

Robert Aitken An astronomer who saw double December 30, 2014

Hailstorm The inner planets take a beating December 28, 2014

Alhena The bright foot of a celestial twin December 27, 2014

Gemini Rising The impressive celestial twins December 26, 2014

Hot Weather Hot weather on a distant planet December 25, 2014

Moon, Mars, and Venus Bright lights in the early evening December 24, 2014

Moon and Mars Flickering images of a famous world December 23, 2014

Moon and Spica Eyeballing some changes in the sky December 15, 2014

Moon and Jupiter Measuring the solar system with a ruler December 9, 2014

Disappearing Triangle A holdover from summer skies December 5, 2014

Fast Day A planet that spins in a hurry December 1, 2014

Rara Avis Rare birds in southern skies November 28, 2014

Wang Liang A bright warrior in the northern sky November 21, 2014

More Edwin Hubble Discovering the expanding universe November 20, 2014

Edwin Hubble A memento of a college basketball star November 19, 2014

Daylight Saving Time Saving daylight to save energy October 31, 2014

New Distance The Seven Sisters move farther away October 27, 2014

More Polaris A “hiccup” for the North Star October 23, 2014

Polaris Pacing off the distance to the North Star October 22, 2014

Star Time Setting your watch by the stars October 20, 2014

New Names Spicing up the names of distant worlds October 19, 2014

Daniel Kirkwood Explaining bands of nothing September 25, 2014

John Goodricke Solving the mystery of a demon star September 16, 2014

Silver Arch A silver archway across the evening sky September 13, 2014

World War II, Part III Science and service in World War II September 3, 2014

World War II, Part II European astronomy during the war September 2, 2014

World War II Heading toward World War II September 1, 2014

Moon and Planets Ringing out the weekend August 30, 2014

Panhu A country that’s gone to the dogs August 29, 2014

Cat’s Eye Nebula The true nature of a glowing cat’s eye August 28, 2014

Doomed Planets Doomed planets around a dying star August 23, 2014

Planet Bonanza A plenitude of exoplanets August 22, 2014

Moon and Planets A bright show in the dawn sky August 21, 2014

More Venus and Jupiter Aligning two celestial headlights August 16, 2014

Planet Pairings Pairs of planets bracket the Sun August 15, 2014

Anders Angstrom Scanning the “barcode” of the Sun August 12, 2014

Ranger 7 A successful crash in the Moon Race July 30, 2014

Sagittarius A steaming teapot in the southern sky July 23, 2014

Moon and Venus Visiting the cool mountains of Venus July 22, 2014

Spearhead Spearheading a look at the Seven Sisters July 19, 2014

Venus and Mercury Bright, hot planets in the dawn sky July 10, 2014

Moon, Mars, and Spica A close but wide-spread trio July 4, 2014

Feeling the Heat Looking at the Sun from near and far July 3, 2014

Fresh Ideas Looking for fresh ideas July 2, 2014

Pitching Ideas Pitching ideas for new missions July 1, 2014

Moon and Regulus Locking the Moon in position June 30, 2014

Cygnus Rising A starry bird and a Mayan king June 29, 2014

Moon and Jupiter Watching the twilight fade away June 28, 2014

Lyman Spitzer Probing matter between the stars June 24, 2014

Moon and Venus A brilliant early morning encounter June 22, 2014

Summer Solstice Plotting the motions of the Sun June 19, 2014

Leaping Gazelle A gazelle leaps across the sky June 14, 2014

Disappearing Family A bright family drops from view June 13, 2014

Summer Triangle Bright stars shine through the moonlight June 12, 2014

Menkent The nearby shoulder of a centaur June 8, 2014

Rebuilding Rebuilding astronomical history June 4, 2014

Clark Telescopes Celebrating some astronomical masterpieces June 3, 2014

Moon and Mercury Ghostly apparitions in the evening sky May 29, 2014

Moon and Venus A case of deceptive beauty May 23, 2014

Distant Neighbors Looking for distant neighbors May 20, 2014

Distant Realms A realm of iceballs far from the Sun May 19, 2014

Distant Borders Crossing a distant border May 18, 2014

Planet Parade A parade of planets in the evening sky May 15, 2014

Moon and Saturn Zipping past a distant giant May 13, 2014

McDonald at 75, V Studying the mysteries of the universe May 8, 2014

McDonald at 75, IV Probing the mysteries of the stars May 7, 2014

McDonald at 75, III Collaboration in the name of science May 6, 2014

McDonald at 75, II Lawsuits, recruitment, and stars May 5, 2014

McDonald at 75 The start of a scientific adventure May 4, 2014

Distant Planets IV Young planets on the move April 30, 2014

Distant Planets III A giant planet near the head of the water snake April 29, 2014

Distant Planets II A patient search for distant planets April 28, 2014

Distant Planets Looking for hard-to-find planets April 27, 2014

61 Virginis Some nearby planetary neighbors April 24, 2014

Space Fair A world’s fair for the Space Age April 21, 2014

Changing Skies Seeing through the moonlight April 17, 2014

North Galactic Pole Gazing away from the Milky Way April 11, 2014

Moon and Jupiter Winging through the skies of Jupiter April 5, 2014

Moon in the Middle Bright stars packed around the Moon April 4, 2014

Stepping Stone A long trip to nowhere April 3, 2014

To the Stars A tall ship and a star to sail her by April 2, 2014

Mariner 10 at Mercury A first look at a little planet March 28, 2014

More Moon and Venus Probing an unpredictable polar vortex March 26, 2014

Moon and Venus A roller-coaster ride for a bright planet March 25, 2014

Crow and Cup The crow gets in a spot of bother March 22, 2014

Yakov Zel’dovich From exploding bombs to exploding stars March 7, 2014

In-Between Planets Super-Earths and mini-Neptunes March 3, 2014

Moon and Venus Love and beauty in the dawn sky February 23, 2014

Earths Galore Earth-like planets by the millions February 21, 2014

Moon and Regulus Busy times for the Moon February 13, 2014

Brilliant Venus The “morning star” at its brightest February 12, 2014

Moon and Venus A beautiful dawn encounter January 26, 2014

Morning Planets Lining up some early morning planets January 25, 2014

Morning Planets Bright planets in the dawn sky January 16, 2014

Moon in the Middle Boxing in the gibbous Moon January 11, 2014

Moon and Aldebaran Peeking at the Moon’s backside January 10, 2014

Getting Started Cooking up a piece of glass December 30, 2013

Vanishing Venus The demise of the evening star December 29, 2013

Midnight Stars Celebrating with the stars December 28, 2013

Winter Solstice Drawing up the winter solstice December 20, 2013

Star Songs Tuning in to the stars December 19, 2013

Moon and Aldebaran Looking for a place to settle down December 14, 2013

Super Origins A refugee from the planet Krypton December 13, 2013

Annie Jump Cannon II Classifying the stars December 10, 2013

Annie Jump Cannon A rare astronomical opportunity December 9, 2013

Pickering’s Harem Pioneering at 25 cents an hour December 8, 2013

Moon and Venus Lighting up a Venusian day December 3, 2013

Pioneer 10 at Jupiter Going eye-to-eye with a giant December 2, 2013

Blue-Hot Planet A visit to another blue planet December 1, 2013

Moon and Planets Two planets wander across the sky November 29, 2013

Moon and Spica Following the rhythms of the night November 27, 2013

Moon and Companions Growing fresh veggies on the Moon November 24, 2013

William Herschel III Dangerous nights at the telescope November 15, 2013

William Herschel II Making up for lost time November 14, 2013

William Herschel A musical intro for a noted astronomer November 13, 2013

Moon and Venus Lighting up a night sky November 4, 2013

The Crane A crane strides across the southern sky October 30, 2013

War of the Worlds An attack from Mars October 29, 2013

More Moon and Jupiter Wrapping a spacecraft in plastic October 24, 2013

Tail Stars The back ends of two constellations October 22, 2013

Moon and Aldebaran Peeking through the moonlight October 20, 2013

Juno at Earth Getting a boost from home October 7, 2013

Moon and Jupiter Looking for a giant planet September 27, 2013

To the Stars Building a road to the stars September 16, 2013

Winter Preview Taking a sneak peek at winter September 14, 2013

A Tale of Two Skies Taking a spin on a merry-go-round September 9, 2013

Moon and Venus Phasing in on the “evening star” September 7, 2013

Venus and Spica The always-hot “evening star” September 4, 2013

A New Start An observatory gets a new start September 2, 2013

Changing Directions A change of direction for McDonald Observatory September 1, 2013

Moon in the Middle The Moon and a bright triangle August 30, 2013

Bernard Lovell Pioneering a new way to see the universe August 28, 2013

HAT P-7 Cooling off a distant star August 15, 2013

Toasted Planets Toasting planets from the inside out August 14, 2013

Moon, Spica, and Meteors A double feature in the night sky August 10, 2013

More Moon and Venus Stirring up some lunar dust August 9, 2013

Moon and Venus An unforgiving environment August 8, 2013

Water Carriers Starry vessels in the midnight sky August 7, 2013

More Moon and Planets The Moon and a horde of planets August 2, 2013

Moon and Planets The Moon and a lineup of planets August 1, 2013

Orbital Menagerie An entire zoo of space travelers July 29, 2013

Spinning in Orbit Spinning around the Earth July 28, 2013

Venus and Regulus A fairy tale in the evening sky July 19, 2013

Bookends Bookending morning and evening skies July 18, 2013

Water World Diving into lunar research July 16, 2013

Solar Highway Following the path of the Sun July 11, 2013

Moon and Venus Heating up the “evening star” July 9, 2013

Delphinus Sneaking into astronomical history July 7, 2013

July Honoring a famous calendar maker June 30, 2013

Sky Test A test for dark night skies June 29, 2013

Maximilian Wolf Snapping pictures of the night sky June 21, 2013

Evening Treats Highlights of the evening sky June 17, 2013

Breaking Ground A “seagull” takes flight June 15, 2013

More Moon and Planets Putting a new spin on the evening star June 10, 2013

Moon and Planets Lining up the “evening star” June 9, 2013

Sunquakes Rumbling through the Sun June 8, 2013

At the Edge At the edge of the solar system June 7, 2013

Young-Sun Paradox II A weight-loss plan for the Sun June 6, 2013

Young-Sun Paradox Turning up the thermostat June 5, 2013

Changing Sun Our steadily changing Sun June 4, 2013

Solar Twins II Hunting for worlds like Earth June 1, 2013

Bright Contrasts Different worlds with a similar look May 26, 2013

Evening Planets Celestial theater in the evening sky May 24, 2013

Moon and Spica A small but vast astronomical gap May 20, 2013

Faith 7 The end of a space-age singles act May 15, 2013

Nicolas Louis de Lacaille Mapping southern skies May 14, 2013

Skylab High-flying eyes on the Sun May 13, 2013

Moon and Jupiter A bright trio in the evening sky May 10, 2013

Star Wheel Whirling around the North Star April 30, 2013

Moon and Saturn A futuristic buggy race April 24, 2013

Sutter’s Mill A new strike at Sutter’s Mill April 22, 2013

Alpha Centauri Planet A nearby planetary neighbor April 20, 2013

Moon and Regulus A special day for astronomy April 19, 2013

The Naughty Crow A naughty crow angers the gods April 14, 2013

Moon and Jupiter Measuring the skin of the Moon April 13, 2013

Time and Navigation A helpful device for seeing the world April 10, 2013

Celestial Navigation Navigating by the stars April 9, 2013

Tau Boötis Keeping an eye on a star with a planet April 6, 2013

Moon and Companions A bright highlight on the dark Moon March 27, 2013

Pyramid Stars Guiding lights of the ancient world March 24, 2013

More Moon and Regulus Protecting some lunar monuments March 23, 2013

The Bull’s Horns The Moon takes the bull by the horns March 17, 2013

Moon and Companions The Moon slides across the sky March 16, 2013

Pulsar Planets Reborn from a violent demise March 11, 2013

Planetary Debris Rocky evidence of planetary systems March 10, 2013

In the Zone Comfortable worlds around feeble stars March 9, 2013

Lots of Planets Strength of discovery in numbers March 8, 2013

Four Suns A world with four suns in the sky March 7, 2013

Alcyone Spinning up a bright young star February 26, 2013

Polaris III Poking into the life of a famous star February 20, 2013

Polaris II The un-steady beat of the North Star February 19, 2013

Polaris Guided by the North Star February 18, 2013

Grand Sky A “grand” view of the night sky February 1, 2013

Moon and Companions From leading light to a pale second January 31, 2013

Missed Opportunity Missing a “stellar” opportunity January 27, 2013

Moon and Regulus Hercules embarks on a quest January 26, 2013

Winter Circle Bracketing the Winter Circle January 25, 2013

Hot Planet The glow of a small but hot planet January 23, 2013

Flashy Neighbor Evidence of a flashy neighbor January 21, 2013

Moon and Jupiter Tiny planets around a tiny star January 20, 2013

Gemini An uncommon story in the night sky January 13, 2013

Holiday Skies Lighting up the holiday sky December 30, 2012

Moon and Jupiter II Lighting up the Christmas-night sky December 24, 2012

Moon and Jupiter Bright lights for Christmas Eve December 23, 2012

Venus and Antares Snow clouds on a hot world? December 21, 2012

Winter Solstice A changing calendar cycle December 20, 2012

The Sun III Looking for the surface of the Sun December 18, 2012

The Sun II The long trip before the journey begins December 17, 2012

The Sun Powering up the Sun December 16, 2012

More Mariner 2 Destroying a “second Earth” December 13, 2012

Mariner 2 Pioneering a path to another world December 12, 2012

Lunar Returns The continued exploration of the Moon December 10, 2012

Apollo 17 A busy three days on the Moon December 9, 2012

More Moon and Companions A grand era of exploration December 8, 2012

Jupiter at Opposition A jovial denizen of the night sky November 30, 2012

Nukes in Space II Futuristic rockets from the past November 29, 2012

Nukes in Space Powering a mission to Mars November 28, 2012

Moon and Companions Taking a peek at the Moon’s backside November 9, 2012

Dark Parks Unfettered views of the night sky November 5, 2012

Blue Night The night sky gets a little bluer November 4, 2012

White-Dwarf Planets II Dead stars consume dead planets October 16, 2012

Moon and Regulus Brightening up the Moon October 9, 2012

Moonwatching Moonlight on an autumn night September 21, 2012

Moon and Mars Prime real estate on other worlds September 18, 2012

Moonless Nights The wonders of a moonless night September 15, 2012

Hot Jupiters Clearing out a star system September 14, 2012

Andromeda A grand story in the night sky September 9, 2012

Moon and Venus Drying out a wet planet September 8, 2012

Moon and Companions The stars foretell the weather September 5, 2012

Gamma Cephei IV Getting messy for science September 4, 2012

Gamma Cephei III Keeping a planet on the table September 3, 2012

Gamma Cephei The top of the king’s starry house September 1, 2012

Seventh Month Miscounting the months August 31, 2012

Dune Worlds Giant sand dunes on alien worlds August 30, 2012

Red Rivals Colorful rivals in the evening sky August 28, 2012

OSIRIS-Rex Studying a threatening space rock August 25, 2012

Moon and Companions A traffic jam in the evening sky August 20, 2012

Eclipse Watcher Risking life and limb for a solar eclipse August 18, 2012

Cloudy Skies A cruel twist of nature August 17, 2012

Moon and Venus A close encounter in the dawn sky August 11, 2012

Perseid Meteors The perfect spot for the Moon August 10, 2012

Moon, Jupiter, and Aldebaran The Moon takes a pounding August 9, 2012

Mars, Saturn, and Spica A bright but rapidly closing triangle August 7, 2012

Alexandria A city — and a star — fit for a king July 19, 2012

Tuttle Comets War, embezzlement, and comets July 16, 2012

Swift Comets From hardware-store owner to cosmic celebrity July 15, 2012

Summer Delights Bright delights in the summer sky July 14, 2012

More Moon and Companions A sky show that’s worth getting up for July 13, 2012

Moon and Companions A gathering of astronomical superstars July 12, 2012

Venus and Aldebaran Bright and brighter in the dawn sky July 5, 2012

The Ecliptic Following the path of the Sun June 30, 2012

More Moon and Companions Turning on some far-away lamps June 26, 2012

Companions Companionship in the evening sky June 25, 2012

Leo Minor Stars without much flash June 22, 2012

Venus and Jupiter An encore performance in the dawn sky June 21, 2012

Unproductive Sun Outshining the Sun — sort of June 17, 2012

Moon and Jupiter Swinging into the morning sky June 15, 2012

Future Neighbor A future close neighbor to the Sun June 13, 2012

Lunar Secrets New secrets from old moonrocks June 11, 2012

Back to the Moon(rocks) New discoveries from old rocks June 10, 2012

Johann Galle Taking note of a new planet June 8, 2012

Solar Spotters Getting a better bead on the Sun June 5, 2012

Moon, Mars, and Regulus Dark ice at the Moon’s poles May 27, 2012

The Llama The sparkling eyes of the llama May 25, 2012

Moon and Venus Sliding past the Moon and headed for the Sun May 20, 2012

Clockwork Eclipses Ticking off the hours until a solar eclipse May 16, 2012

Luna See Firing a laser at the Moon May 8, 2012

Moon and Mars Crowded skies above the Moon April 30, 2012

Ranger 4 Slamming into the far side of the Moon April 25, 2012

Vanishing Lights Ready for a stellar vanishing act April 24, 2012

Moon and Taurus Snapping the universe -- from the Moon April 22, 2012

Apollo 16 Fun and science on the lunar surface April 20, 2012

Warp Drive Engaging the warp drive April 17, 2012

New Ideas New ideas for exploring the universe April 16, 2012

Saturn at Opposition Looking back toward home April 13, 2012

Moon, Saturn, and Spica Bracketing the horn of the dragon April 5, 2012

Double Sunsets Double sunsets on alien worlds April 4, 2012

Venus and Pleiades The evening star and the littler dipper March 31, 2012

Moon, Jupiter, and Venus A brilliant lineup in the evening sky March 23, 2012

More Venus and Jupiter Worlds with and without companions March 11, 2012

Venus and Jupiter Following a pair of cosmic headlights March 10, 2012

Double Treat A double treat in the evening sky March 6, 2012

Comfy Planets Looking for comfy homes for life March 3, 2012

Mars at Opposition Drawing a map of the solar system March 2, 2012

Secret Mars Unlocking the secrets of the Red Planet March 1, 2012

Leap Day Leaping into the modern calendar February 28, 2012

Moon and Planets III Artistry on a planetary scale February 25, 2012

Moon and Venus Encapsulating a bit of the Moon February 24, 2012

Friendship 7 Getting back in the Space Race February 19, 2012

Looking Deep Looking for storms before they’re born February 12, 2012

Geminga Giving birth to a “dead” star February 11, 2012

White Dwarfs III Dead planets around dead stars? February 2, 2012

The Big Dog Biting into a bright constellation January 28, 2012

Brightest Lights Cutting off a slice of the sky January 20, 2012

Space Rocks II Studying pieces of other worlds January 18, 2012

Harvey Nininger II Buying space rocks for a dollar a pound January 16, 2012

Harvey Nininger A burning passion for space rocks January 15, 2012

Moon and Hyades Staring into the face of the bull January 4, 2012

Quadrantid Meteors The children of a celestial break-up January 2, 2012

Featured Images

Backlit view of Pluto landscape from New Horizons

Hazy Skies September 22, 2015

Artist's concept of a young Jupiter-like planet

Young Giant August 27, 2015

New Horizons view of young mountains on Pluto

Ice Mountains July 15, 2015

July 12 views of Charon and Pluto from New Horizons

Hours Away July 13, 2015

New Horizons view of Pluto and Charon, July 1, 2015

Best Shot July 7, 2015

Encounter between Venus and Jupiter, July 2015

Planetary Headlights July 2, 2015

Views of the Venus-Jupiter evening encounter, June 26-July 4, 2015

Brilliant Encounter June 26, 2015

Artist's concept of a moons orbiting a Jupiter-like exoplanet

Worlds of Worlds June 9, 2015

Stepping Out June 3, 2015

The western evening sky of May 22, 2015

Crowded Skies May 22, 2015

Ringfest May 20, 2015

Image of a powerful solar flare on March 11, 2015

Solar Flare March 12, 2015

Artist's concept of Solar Max in orbit

Sun Watcher February 14, 2015

A brilliant aurora from the International Space Station

Fiery Sky January 21, 2015

Composite image of the Sun

Hot Sun December 24, 2014

Double Dribble November 20, 2014

View of a newly forming planetary system around the young star HL Tauri

Planet Tracks November 6, 2014

Postcard of the historic Elgin Watch Company Observatory in Illinois

Star Time October 25, 2014

Through the Glow September 16, 2014

Ranger 7 images of the Moon, July 31, 1964

Success at Last July 31, 2014

Artist's concept of Solar Orbiter

Feeling the Heat July 4, 2014

Three solar flares in early June 2014

Solar Fireworks June 12, 2014

Venus, Mercury, and the earthshine-illuminated crescent Moon

Lighting the Shadows May 30, 2014

Otto Struve, first director of McDonald Observatory

First Director May 8, 2014

Autographs from the dedication of McDonald Observatory

Who's Who May 7, 2014

Construction of McDonald Observatory's 82-inch telescope, ca. 1934

Celebrating May 6, 2014

Participants in the McDonald Observatory dedication, May 5, 1939

Getting Started May 5, 2014

Diagram showing the layouts of several exoplanet systems

Going Farther April 30, 2014

Artist's concept of a range of recently discovered exoplanets

Planet Hunting April 28, 2014

Views from the 1964 World's Fair

Space Fair April 22, 2014

Artist's concept of a solar sail

Sailing Along April 3, 2014

Mariner 10 at Mercury

First Encounter March 29, 2014

Venus Express movie showing south polar vortex

Double Vortex March 27, 2014

Lunar Reconnaissance Orbiter view on lunar north polar regions

Top o' the Moon March 19, 2014

Superman's back story may have been inspired by an exploding star

Exploding Stars December 14, 2013

China's Yutu rover on the Moon in an artist's concept

Lunar Returns December 14, 2013

Annie Jump Cannon

Astronomical Pioneer December 10, 2013

Female "computers" at Harvard College Observatory

Data Processing Center December 9, 2013

The life and times of William Herschel

Stellar Musician November 14, 2013

Artist's concept of extrasolar planet Kepler 78b, an Earth-sized world

Hot Rock October 31, 2013

Artist's concept of planet HAT-P7b

Hot Spot August 16, 2013

Eastern dawn sky, early August 2013

Morning Jam August 2, 2013

One of the first images from IRIS, a new Sun-watching satellite

First Sunlight July 31, 2013

Space-faring spider Arabella spins her first web in orbit, 1973

Spiders in Space July 29, 2013

Artist's concept of a blue exoplanet

Blue-Hot Planet July 13, 2013

Planetary conjunction, May 2013

Evening Traffic Jam May 25, 2013

Skylab in orbit

First Space Station May 14, 2013

The starry ceiling of Grand Central Terminal

Grand Sky February 2, 2013

Soyuz spacecraft approaches space station with Moon in background

Ready for Arrival December 31, 2012

Artist's concept of the Sun's structure

Powerhouse December 17, 2012

Gravitational map of the Moon compiled by the GRAIL mission

Lunar Attraction December 15, 2012

Artist's concept of Mariner 2 flying past Venus, December 14, 1962

First Encounter December 13, 2012

Apollo 17 astronaut Gene Cernan drives his lunar rover

End of the Road December 10, 2012

Nighttime view of the southeastern U.S. from the International Space Station

Blue Night November 5, 2012

Moon, Jupiter, and Taurus, October 4-5, 2012

Bull Rush October 4, 2012

Venus-Regulus encounter in the pre-dawn sky, October 2-4, 2012

Morning Mashup October 1, 2012

First-quarter Moon

Moonwatch September 22, 2012

Andromeda and the Milky Way head for a galactic pile-up

Collision Course September 12, 2012

Artist's concept of the Gamma Cephei star system

Stellar Geometry September 4, 2012

About one hour after sunset, late August and early September

Red Rivals August 29, 2012

Neil Armstrong aboard the lunar module Eagle, July 21, 1969

Leading the Way August 26, 2012

A flare on the surface of the star HD 189733 blasts away the atmosphere of an or

Zapped! June 29, 2012

Moon and Companions, June 2012

Moon and Company June 25, 2012

Apollo 17 at the rim of Shorty Crater, December 1972

Back to the Moon(rocks) June 11, 2012

An ultraviolet camera gazes skyward from the Moon during the Apollo 16 mission

Looking Up April 23, 2012

Apollo 16 lunar module, Orion, on the Moon's Plains of Descartes

Almost Home April 21, 2012

Space shuttle Discovery flies above Washington, DC, April 17, 2012

Last Stop April 19, 2012

Artist's concept of the Kepler-35 system, with a giant planet orbiting two stars

Seeing Double April 4, 2012

A powerful solar flare erupts on March 6, 2012

Stormy Skies March 8, 2012

Mars is at opposition in early March 2012, shining brightest for the year

Mighty Mars March 3, 2012

Voyager mission enhanced-color image of Jupiter's Great Red Spot

Planetary Impressionism February 26, 2012

John Glenn enters his Mercury capsule (right), and launches on February 20, 1962

Up, Up, and Away! February 20, 2012

Dark lunar features are named seas or oceans

Split Personality February 9, 2012

A January 23, 2012 solar flare

Restless Sun January 30, 2012

Endeavour Crater, winter home of the Opportunity Mars rover

Winter Wonderland January 26, 2012

M1, the Crab Nebula, in a Hubble Space Telescope image

Crab Nebula January 6, 2012

The Moon and Hyades, night of January 5, 2012

Staring at the Bull January 5, 2012

Phoenix and Grus in the southern sky, late November evening

Rare Birds November 28, 2011

2011 image of the Apollo 12 landing site, from Lunar Reconnaissance Orbiter

Still Standing September 9, 2011

Yerkes Observatory in Wisconsin is home to the world's largest refractor

Still Going August 18, 2011

Atlantis launches on the final space shuttle mission, July 8, 2011

Last Call July 8, 2011

Alan Shepard enters his capsule, then launches aboard Freedom 7, May 5, 1961

A-OK Flight May 5, 2011

Moon and planets in the dawn sky, April 30/May 1, 2011

Dawn Encounter April 29, 2011

Launches of Vostok 1, STS-1 (space shuttle Columbia)

Double Date April 12, 2011

Streamers of dust partially obscure the "seven sisters," members of the Pleiades

Veiled Sisters April 6, 2011

Mercury and Jupiter passing in the evening sky

Just Passing By March 13, 2011

Sky view from space shuttle Discovery, February 2011

Nice View March 2, 2011

Space shuttle Discovery launch, February 24, 2011

Last Show February 25, 2011

Apollo 14 commander Alan Shepard poses with the American flag on the Moon

Long Journey February 6, 2011

Lunar crater gouged by Apollo 14 booster rocket

A Big Whack February 4, 2011

Earth is in the middle of the Sun's habitable zone

In the Zone January 18, 2011

The Sun as seen from space

Close to the Sun January 3, 2011

Western sky a couple of hours after sunset in late December

Happy Holidays! December 25, 2010

Eruption of gas from the surface of the Sun

Sun Power December 22, 2010

Japanese spacecraft Akatsuki at Venus

Venusian Dawn December 6, 2010

China Clipper Sails the Pacific Ocean

Night Over Water November 22, 2010

Lunokhod image of its tracks on the lunar surface

Found It! November 15, 2010

Luna 16 diagram

To the Moon and Back September 24, 2010

MIT professor Dava Newman models a new type of space suit

Dressed for Success (in Space) September 15, 2010

Two planets and a star team up with the crescent Moon in the western evening sky

Moon and Companions September 10, 2010

Evaporating planet around the star HD209458

Puffy Planet August 26, 2010

Western Lineup June 27, 2010