13 July 2012, 07:00 AM ET
How much do you know about our solar system's major ring bearer?
12 July 2012, 02:02 PM ET
On July 15th, 2012, Earth's Moon will occult Jupiter and its four largest moons – Europa, Io, Callisto and Ganymede – blocking them from skywatchers' views.
11 July 2012, 01:33 PM ET
Dwarf planet Pluto has one giant moon, Charon, but now is known to have four more tiny satellites.
11 July 2012, 12:04 PM ET
The Solar System’s Runt
10 July 2012, 06:27 PM ET
The atmospheric feature could herald the start of winter in Titan's south.
10 July 2012, 04:48 PM ET
NASA's Cassini spacecraft captured images of a revolving mass of gas in the atmosphere over Titan's southern pole. This odd cloud group completed a full rotation in 9 hours – quicker that the moon's 16-day rotation period.
06 July 2012, 05:13 PM ET
From July through August, planet groupings in the pre-dawn and dusk skies will impress skywatchers around the world.
06 July 2012, 10:42 AM ET
This cool space wallpaper, a particularly strong jet stream churns through Saturn's northern hemisphere in this false-color view from NASA's Cassini spacecraft.
28 June 2012, 02:01 PM ET
The subsurface sea could contain water, and maybe even life.
27 June 2012, 07:01 AM ET
This week's night sky offers a special trio of treats.
25 June 2012, 05:36 PM ET
In constrast, jet streams on Earth derive their energy from the sun.
20 June 2012, 08:00 AM ET
During the first test of the Titan-Centaur rocket, the Centaur stage failed to ignite.
14 June 2012, 10:56 AM ET
Cassini spacecraft looks toward Titan and its dark region called Shangri-La in this stunning space wallpaper.
13 June 2012, 01:01 PM ET
The tropical lake on Titan is the size of Utah's Great Salt Lake in the United States.
24 May 2012, 06:44 AM ET
NASA's Cassini probe is preparing to tilt its orbit around Saturn dramatically.
22 May 2012, 09:46 AM ET
Tarter will begin fundraising for the SETI Institute full-time.
18 May 2012, 07:00 AM ET
Researchers are keying in on methane as a possible indicator of alien life.
07 May 2012, 07:36 AM ET
From the bright supermoon to earth-like alien planets munching on stars, it's been a busy week in space.
04 May 2012, 01:17 PM ET
The ice geysers of Enceladus and Dione's battered surface take center stage in Cassini's views.
27 April 2012, 10:05 AM ET
Ontario Lacus likely dries out and refills periodically, a new study suggests.
25 April 2012, 07:25 PM ET
This up close and personal look at the gas giants and their moons was stitched together by Sander van den Berg using imagery captured by NASA's Voyager and Cassini spacecrafts. Van den Berg named the black and white piece 'Outer Space'.
25 April 2012, 05:00 PM ET
The footage comes from NASA's Voyager and Cassini spacecraft.
24 April 2012, 04:12 PM ET
The outermost F ring around Saturn has long been a mystery.
22 April 2012, 07:27 AM ET
From the transfer of shuttle Discovery to its new home to a SPACE.com tee up in a balloon, it's been a busy week in space.
17 April 2012, 10:35 PM ET
In this cool space wallpaper, the camera was pointing toward Enceladus at approximately 120,000 kilometers away.
15 April 2012, 07:27 AM ET
From an expedition to explore auroras to sun's sibling stars, it's been a busy week in space.
13 April 2012, 06:30 AM ET
Titan is the only moon in the solar system with a thick atmosphere. See more Titan facts here.
10 April 2012, 01:59 PM ET
Saturn reaches opposition on April 15, the point when it is directly opposite the sun for 2012.
09 April 2012, 05:44 AM ET
An odd ridge around Iapetus may be the leftovers from a dead moon.
07 April 2012, 06:12 AM ET
From cabs in space to alien earths, it's been a busy week in space. Vote for the week's best space story.
06 April 2012, 10:46 AM ET
A looming shortage of the radioactive isotope worries many planetary scientists.
29 March 2012, 04:55 PM ET
The moons Enceladus, Janus and Dione shine in new pictures from Cassini.
27 March 2012, 05:58 PM ET
This cool space wallpaper shows Cassini spacecraft looks toward the dark side of Saturn's largest moon as a circle of light is produced by sunlight scattering through the periphery of Titan's atmosphere.
23 March 2012, 07:00 AM ET
Saturn's sixth largest moon, Enceladus, has long intrigued astronomers.
16 March 2012, 09:03 AM ET
During its slow fly-by of Jupiter, NASA's Cassini spacecraft captured imagery of wave motion in the fast-moving jet streams that are a signature of the gas giant.
16 March 2012, 07:00 AM ET
Scientists are hoping to understand how Saturn's moon Iapetus formed and evolved.