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Grades 3-5 (Ages 8-10)

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Mercury March 7, 2016

Jupiter's Moons February 19, 2016

Pluto February 19, 2016

Asteroid

Asteroids February 19, 2016

Neptune

Neptune February 10, 2016

Uranus

Uranus February 10, 2016

Mars

Mars February 10, 2016

Star Party On! June 3, 2010

Mars meteorite

Meteorites May 19, 2010

Equipment Tips May 14, 2010

What to Look For May 14, 2010

Become a Stargazer April 14, 2010

Radio Programs

Moon and Mars A neighbor world gets brighter February 28, 2016

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

Moon and Jupiter A big moon takes a beating January 26, 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

Christmas Moon Lighting up the night December 25, 2015

Long-Night Moon Rudolph gets the night off December 24, 2015

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

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

Moon and Mars A frozen treat on the Red Planet December 4, 2015

Halloween Haunting stars in the evening sky October 31, 2015

Hunter’s Moon Marking time with the Hunter’s Moon October 25, 2015

Close Visitors Keeping an eye out for trouble October 16, 2015

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

Uranus at Opposition A good showing for “George’s Star” October 10, 2015

Morning Mercury A dark planet in the dawn sky October 9, 2015

Moon and More Companions Filling up a Martian crater October 7, 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

John Dobson Bringing telescopes to the masses September 13, 2015

Moon, Venus, and Mars Ancient Mars cools off September 8, 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

Neptune at Opposition II Cranking up the winds on a distant planet August 30, 2015

Neptune at Opposition Neptune in the sky with diamonds August 29, 2015

Shergotty A piece of Mars falls from the sky August 24, 2015

Iron Rain Showering Earth with iron raindrops August 17, 2015

Moon and Uranus Pointing out a neglected giant August 3, 2015

Blue Moon Modern folklore about the night sky July 29, 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 Companions Getting ready to change addresses July 17, 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

Short Moon A short night of moonwatching June 30, 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 Jupiter Plunging into a hidden ocean June 19, 2015

Martian Spring Wild seasons on the Red Planet June 17, 2015

Oceans Gained Filling up Earth’s oceans June 4, 2015

Ocean Lost A massive ocean on the planet Mars June 3, 2015

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

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

Rock Fight Fighting over a rock from space May 1, 2015

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

Evening Mercury Measuring a planetary day April 25, 2015

Meteorites III Picking up some unusual rocks April 18, 2015

Meteorites II Measuring the age of the solar system April 17, 2015

Meteorites Rare treasures from beyond Earth April 16, 2015

Moon and Jupiter Dipping into a giant hot tub March 28, 2015

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

Moon and Mars Warming up a cold planet March 20, 2015

Moon and Jupiter Adding color to a giant planet March 1, 2015

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

Celestial Equator Splitting the night sky in half January 30, 2015

Moon and Mars Asteroids take aim at Mars January 21, 2015

Venus and Mercury Pointing the way to a little planet January 9, 2015

Robert Aitken An astronomer who saw double December 30, 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

Mars at Perihelion Mars gets close to the Sun December 12, 2014

Disappearing Triangle A holdover from summer skies December 5, 2014

Moon and Uranus The Moon takes aim at a faint giant November 30, 2014

Rara Avis Rare birds in southern skies November 28, 2014

Moon and Mars Jet lag after a long trip November 24, 2014

Halloween A dark and lonely night in the dome October 30, 2014

Moon and Mars The planet Mars runs in place October 26, 2014

Close to Mars An icy relic takes aim at Mars October 15, 2014

Uranus at Opposition Lining up a giant oddball October 5, 2014

Daniel Kirkwood Explaining bands of nothing September 25, 2014

MAVEN Probing Mars’s escaping atmosphere September 20, 2014

Moon and Jupiter The heat of a twisted moon September 18, 2014

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

The Next Wave A new wave of explorers at Mars September 15, 2014

Supervolcanoes Supervolcanoes on the Red Planet September 14, 2014

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

Neptune at Opposition Lining up a blue-green giant August 26, 2014

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

Mars and Saturn A new season for the Red Planet August 20, 2014

Great Red Spot III The case of the disappearing red spot August 19, 2014

Great Red Spot II Getting the red out of Jupiter’s “eye” August 18, 2014

Great Red Spot Staring into the eye of Jupiter August 17, 2014

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

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

Moon and Mars Coloring the Martian sky August 1, 2014

Asteroid Hunting Pointing the way to two asteroids July 12, 2014

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

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

Lyman Spitzer Probing matter between the stars June 24, 2014

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

Cosmic Hailstones Telling tales of space rocks June 11, 2014

More Moon and Mars A planetary deepfreeze June 6, 2014

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

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

Evening Mercury Shrink-wrapping a small planet May 14, 2014

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

Moon and Jupiter Big geysers on big moons May 2, 2014

Changing Skies Seeing through the moonlight April 17, 2014

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

Mars at Opposition III The hazards of living on Mars April 8, 2014

Mars at Opposition Snuggling fairly close to Mars April 6, 2014

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

More Moon and Companions Getting close to bright Mars March 17, 2014

Moon and Companions Seeing orange on a nearby planet March 16, 2014

Old Mars Rock A relic of a bygone era on Mars March 15, 2014

Condor Galaxy The condor stretches its galactic wings March 14, 2014

Mercury in the Morning An irritating planet in the dawn twilight March 13, 2014

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

Moon and Companions Quartering the Moon February 20, 2014

Evening Mercury The wrinkled skin of a small planet January 30, 2014

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

Moon and Mars Taking a trip to Mars January 20, 2014

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

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

Earth Impacts V Protecting Earth from space rocks January 9, 2014

Quadrantid Meteors Looking for the parent of a meteor shower January 1, 2014

Midnight Stars Celebrating with the stars December 28, 2013

Star Songs Tuning in to the stars December 19, 2013

Long-Night Moon Filling the night with moonlight December 15, 2013

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

Geminid Meteors Feeding a meteor shower December 11, 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

Mars Companions Distant companions for the Red Planet November 30, 2013

MAVEN The disappearing Martian air November 16, 2013

Antarctic Adventures Ice, rocks, and other worlds November 10, 2013

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

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

Moon and Mars A comfortable planetary neighbor October 27, 2013

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

Moon and Aldebaran Peeking through the moonlight October 20, 2013

Icy Mars Digging into Mars’s frozen past October 10, 2013

Heading for Mars Streaking down Martian slopes October 9, 2013

Mars on Earth Looking for Mars on Earth October 8, 2013

Uranus at Opposition Pondering some “giant” mysteries September 30, 2013

Moon and Companions Warming up a Martian hemisphere September 29, 2013

Harvest Moon Harvesting some extra moonlight September 17, 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 in the Middle The Moon and a bright triangle August 30, 2013

Moon and Jupiter An adventure traveler’s idea of heaven August 29, 2013

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

Asteroid Moons Asteroids with small companions August 27, 2013

Neptune at Opposition Probing deep into a planet’s atmosphere August 25, 2013

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

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

Bookends Bookending morning and evening skies July 18, 2013

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

Delphinus Sneaking into astronomical history July 7, 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

Mercury Rising Cold pockets on a hot planet May 27, 2013

Soothing Moon Stirring up some epsom salts May 25, 2013

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

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

Moon and Regulus Lining up some bright moonlight May 16, 2013

Nicolas Louis de Lacaille Mapping southern skies May 14, 2013

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

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

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

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

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

Capistrano Meteorite A California town gets a visitor March 14, 2013

Moon, Jupiter, and Aldebaran Jupiter’s large adopted family February 17, 2013

Moon and Jupiter A large, close-knit planetary family February 16, 2013

Mercury in the Evening A visit from a reticent planet February 15, 2013

Space Watch IV A very close encounter February 13, 2013

Space Watch III Painting our way out of a jam February 12, 2013

Space Watch A target in a cosmic shooting gallery February 10, 2013

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

Winter Circle Bracketing the Winter Circle January 25, 2013

Apophis Keeping an eye on a troublemaker January 7, 2013

Holiday Skies Lighting up the holiday sky December 30, 2012

Long-Night Moon Lighting up the long night December 26, 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

Moon and Mars Visitors from other worlds December 14, 2012

Moon and Jupiter A chilly Moon for a chilly time of year November 27, 2012

Celestial Equator Splitting the sky in half October 14, 2012

Zagami Meteorite A startling messenger from Mars October 2, 2012

Double Impact Bowling over a giant planet September 29, 2012

Uranus at Opposition Overlooking a giant planet September 27, 2012

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

Blue Moon A “colorful” astronomical rarity August 29, 2012

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

Dawn II Piecing together the story of an asteroid August 22, 2012

Dawn A witness to the dawn of the solar system August 21, 2012

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

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

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

Moon and Spica Two bright stars for the price of one July 24, 2012

Desert Storm A rain of stones from beyond Earth July 18, 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

More Vega The bright stars of the “ox boy” July 9, 2012

Distant Sun Slipping away from the Sun July 3, 2012

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

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

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

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

Celestial Geometry A hubbub over celestial geometry June 1, 2012

Moon, Spica, and Saturn Parsing the changes of the Moon May 30, 2012

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

Annular Eclipse II Cycling through centuries of eclipses May 19, 2012

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

Brilliant Venus Lighting up the “evening star” April 27, 2012

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

Moon and Venus Resetting the clocks on Venus April 23, 2012

Moon and Jupiter A giant planet’s disappearing heart April 21, 2012

Mercury in the Morning Teasing out a view of Mercury April 15, 2012

More Saturn at Opposition Dabs of color in the night sky April 14, 2012

Moon, Mars, and Regulus Different pinpoints of light April 1, 2012

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

Storm Season Stirring up cold fronts on Mars March 30, 2012

Summertime The good old summertime March 29, 2012

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

Alien Clusters Alien visitors from other galaxies March 22, 2012

Rings of Uranus A dark discovery for a giant planet March 7, 2012

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

Moon, Mars, and Leo A bold alignment in the night sky March 5, 2012

Evening Mercury Rethinking the birth of a planet March 4, 2012

Moon and Taurus The Moon and two stellar families February 27, 2012

Moon and Planets An impressive display in the evening sky February 23, 2012

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

Moon and Companions Zipping past a giant planet February 10, 2012

Dueling Dippers Stirring up the starry night sky February 9, 2012

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

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

More Moon and Mars Scaling the heights of Mars January 12, 2012

Moon and Mars Watery oases on a desert world January 11, 2012

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

The New Year Bringing the calendar to heel December 31, 2011

New Year’s Eve Sky A celestial greeting for the new year December 30, 2011

Northern Cross Holding together a stellar cross December 24, 2011

The Reindeer An extra reindeer for Santa’s sleigh December 23, 2011

Saturnalia A modern celebration with old customs December 16, 2011

Race to the Pole Racing for the south pole December 13, 2011

Menkalinan The charioteer’s double-jointed shoulder December 3, 2011

Fire and Water Fire and water in the night sky December 2, 2011

Rarae Aves Rare birds in southern skies November 27, 2011

Orion Rising The return of an astronomical beauty November 19, 2011

Moon and Companions Spacing out a morning lineup November 16, 2011

Mercury and Venus Close neighbors in the evening sky November 10, 2011

More Moon and Jupiter Warming up a giant planet November 8, 2011

Moon and Jupiter Powering up a distant aurora November 7, 2011

Daylight Saving Time Stepping back in time November 5, 2011

Venus Returns The return of the “evening star” October 27, 2011

Moon and Mars Strolling on alien worlds October 19, 2011

More Moon and Jupiter Painting a bullseye on a moon October 12, 2011

Uranus at Opposition Diving into an icy planet September 24, 2011

Doomed Moons Recycling on a giant scale September 23, 2011

Moon and Mars Twin moons under alien skies September 21, 2011

Moon and Aldebaran Looking at the Sun’s bright future September 17, 2011

More Moon and Jupiter Reflections on an icy moon September 15, 2011

Moon and Jupiter An ancient god and the modern calendar September 14, 2011

Serpens Splitting up a faint constellation September 13, 2011

Harvest Moon Balancing the Harvest Moon September 10, 2011

Mercury and Regulus An early morning duo September 7, 2011

Watching Earthshine Watching the dark side of the Moon September 4, 2011

Morning Mercury A confusing planet in the morning sky September 1, 2011

Evening Lineup A powerful early-season storm August 30, 2011

Neptune at Opposition Pulverizing a Neptunian moon August 21, 2011

Glass Astronomy Astronomy-under-glass August 15, 2011

Perseid Meteors Drowning out a fading shower August 11, 2011

Moon and Antares A star that's redder than red... August 6, 2011

Juno Looking into the heart of a giant July 31, 2011

Moon and Mars Greening up the Red Planet June 26, 2011

Scutum Shielding a new constellation June 25, 2011

More Moon and Jupiter The solar system's 800-pound gorilla... June 24, 2011

Moon and Jupiter Changing concepts of a giant world June 23, 2011

Moon and Companions Stars and planets move apart June 9, 2011

Transit of Venus One year away from a rare event June 4, 2011

Moon and Stars Following the leader in the evening sky June 3, 2011

More Moon and Jupiter Cutting through the static May 28, 2011

More Moon and Venus A traffic jam in the dawn sky April 29, 2011

Watery Mars Divining for water on Mars April 13, 2011

First-Quarter Moon Half a Moon equals a quarter April 10, 2011

Taking Inventory II Watching for invaders from beyond March 26, 2011

Mercury and Jupiter Big and small in the evening sky March 13, 2011

Urbain Leverrier A "calculated" planetary discovery... March 10, 2011

Moon and Jupiter Grand names for a grand planet March 5, 2011

More Moon and Venus Nighttime objects in the daytime sky February 27, 2011

Moving Dipper A stellar family spreads out February 24, 2011

Changing Skies Looking forward to the Big Handivac February 23, 2011

Dubhe Skies as different from ours as night and day February 22, 2011

Alkaid The "leading" star of the Big Dipper... February 21, 2011

Moon and Jupiter A delayed trip to the Moon February 5, 2011

Celestial Clock Ticking off the hours of the night January 30, 2011

Johannes Hevelius Filling in some gaps in the sky January 28, 2011

Venus and Antares A deceptive morning duo January 21, 2011

Moon and Regulus The stars turn across the night sky January 20, 2011

Moon and Jupiter Preventing alien contamination January 8, 2011

Quadrantid Meteors Tracers of a bygone constellation January 1, 2011

Jupiter and Uranus Two giants passing in the night December 31, 2010

Featured Images

Radio view of asteroid 2015 TB145, which will pass close to Earth on Halloween

Boo! October 31, 2015

Backlit view of Pluto landscape from New Horizons

Hazy Skies September 22, 2015

Comet Crawl September 14, 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

First Eyes on Mars 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

A mosaic of spacecraft images shows the varied surface of Ganymede

Hiding an Ocean June 20, 2015

Sunset at Gale Crater, Mars, April 2015

Blue Skies May 14, 2015

Artist's concept of Earth's distant future

Bright Future April 29, 2015

View of Loki Patera, a lake of molten rock on Io, a moon of Jupiter

Hot Lake March 29, 2015

Curiosity rover view of rock layers inside Gale Crater on Mars

Ancient Lakebed December 9, 2014

Hubble Space Telescope view of Uranus

Tilted Giant October 6, 2014

India's Mars Orbiter Mission

On Target Again September 24, 2014

Artist's concept of MAVEN orbiting MARS

On Target September 20, 2014

Voyager 1 view of Jupiter's Great Red Spot

Long-Lasting Storm August 18, 2014

Hubble Space Telescope view of Jupiter, Ganymede

Layer-Cake Moon August 15, 2014

Europa orbiter mission concept

Fresh Idea July 3, 2014

Hubble views of Jupiter's Great Red Spot

Shrinking Storm May 15, 2014

Views from the 1964 World's Fair

Space Fair April 22, 2014

Artist's concept of early morning fog, clouds, and frost on Mars

Morning Fog April 8, 2014

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

Exploding Stars December 14, 2013

Annie Jump Cannon

Astronomical Pioneer December 10, 2013

Female "computers" at Harvard College Observatory

Data Processing Center December 9, 2013

Launch of MAVEN spacecraft to Mars

On Its Way November 18, 2013

Almost Ready November 18, 2013

Artist's concept of MAVEN Mars orbiter

Mars Maven November 17, 2013

Hubble Space Telescope view of planet Uranus

Blue-Green Giant October 1, 2013

Composite Galileo image of Jupiter's volcanic moon Io

Jovian Adventure August 30, 2013

Eastern dawn sky, early August 2013

Morning Jam August 2, 2013

Kasei Valles, an ancient flood channel on Mars

Ancient Flood June 10, 2013

Planetary conjunction, May 2013

Evening Traffic Jam May 25, 2013

Supercomputer simulations of Earth's magnetic field

Twist and Flip April 8, 2013

The starry ceiling of Grand Central Terminal

Grand Sky February 2, 2013

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

Recent image from Mars rovers Curiosity and Opportunity

Mars Targets September 29, 2012

First-quarter Moon

Moonwatch September 22, 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

View of the asteroid Vesta from the Dawn spacecraft

Ready for Departure August 23, 2012

Solar eclipse of August 19, 1887, from near Berlin

Fire in the Sky August 18, 2012

Moon and Companions, June 2012

Moon and Company June 25, 2012

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

Looking Up April 23, 2012

Water geysers from the south pole of Enceladus, a moon of Saturn

Leaking Moon March 26, 2012

Venus and Jupiter pass each other in the evening sky, March 10-14, 2012

Celestial Headlights March 10, 2012

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

Mighty Mars March 3, 2012

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

Up, Up, and Away! February 20, 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

Jupiter's Great Red Spot and the planet's four largest moons

An Eyeful of Moons January 2, 2012

Galileo spacecraft mosaic of Ganymede, largest moon of Jupiter

Two-Toned Moon December 5, 2011

Phoenix and Grus in the southern sky, late November evening

Rare Birds November 28, 2011

The giant volcano Pele erupts on Jupiter's moon Io

Fire Mountain October 13, 2011

Craters fill an ancient river channel on Mars

Martian Rapids October 10, 2011

Messenger view of Mercury's southern hemisphere

Hard-to-Study Planet September 2, 2011

Moon, Mars, and Aldebaran, July 26-28, 2011

Seeing Orange July 25, 2011

Delta Lyrae and the Summer Triangle

Seeing Double July 10, 2011

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

Dawn Encounter April 29, 2011

Image of water distribution in northern hemisphere of Mars

Watery Mars April 14, 2011

MESSENGER's first color image of Mercury, March 29, 2011

First Glimpse March 31, 2011

Mercury and Jupiter passing in the evening sky

Just Passing By March 13, 2011

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

Long Journey February 6, 2011

Western sky a couple of hours after sunset in late December

Happy Holidays! December 25, 2010

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

Moon and Companions September 10, 2010

A thick dust storm blows across Mars in this image from Mars orbit.

Dusty Skies July 12, 2010

Western Lineup June 27, 2010

Rings and Moons

Rings and Moons June 4, 2010

Big Blue Planet

Big Blue Planet June 1, 2010