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Featured Images

December 30, 2011
Artist's concept of GRAIL spacecraft measuring the Moon's gravitational field

Lunar Arrival

December 26, 2011
Saturn's moons Titan and Dione above Saturn, with Saturn's rings

Saturnian Traffic Jam

December 23, 2011
View of Comet Lovejoy from the International Space Station

Christmas Comet

December 20, 2011
Horsehead Nebula photographed through a McDonald Observatory telescope

3D Horsehead

December 16, 2011
A comet plunges toward the Sun

Survivor: Comet

December 14, 2011

Galactic Swirl

December 5, 2011
Galileo spacecraft mosaic of Ganymede, largest moon of Jupiter

Two-Toned Moon

December 1, 2011
Plumes of gas spew into space from the roiling surface of Betelgeuse, the bright

Stellar Timebomb

November 28, 2011
Phoenix and Grus in the southern sky, late November evening

Rare Birds

November 26, 2011
Ultraviolet view of Venusian clouds from Venus Express orbiter

Cloudy Skies

November 23, 2011
Artist's concept of Curiosity rover on Mars

Ready to Roll

November 17, 2011
Optical and radio image of the Carina Nebula, a vast stellar nursery

Birthplace of the Stars

November 13, 2011
The Saturn Nebula, NGC 7009, as seen by Hubble Space Telescope

Saturn Simulacrum

November 11, 2011
The Russian Phobos-Grunt Mars mission launches on November 8, 2011

Phobos Flop?

November 6, 2011
The glow of the aurora from the International Space Station

Heavenly Lightshow

November 3, 2011
The moon Phobos floats above Mars

Martian Target

October 29, 2011
Galileo view of Gaspra, the first asteroid visited by a spacecraft

First Encounter

October 27, 2011
An artist's concept of the darkest planet yet discovered

Dark World

October 25, 2011
Cassini view of Saturn's moon Enceladus in front of the planet's rings

Saturnian Encounter

October 19, 2011
Two globular clusters; a previously known one at right, and a new one in circle

Star City

October 17, 2011
An aquanaut practices space exploration techniques underwater

Diving into the Future

October 13, 2011
The giant volcano Pele erupts on Jupiter's moon Io

Fire Mountain

October 10, 2011
Craters fill an ancient river channel on Mars

Martian Rapids

October 5, 2011
Radio image of the Antenna galaxies

Boundless Starbirth

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