07 June 2011, 06:00 AM ET
Early movements of the planet Jupiter could explain the perplexing fact that Mars is smaller than it should be.
27 May 2011, 12:49 PM ET
Look to the skies this Memorial Day weekend to see four planets near the moon.
25 May 2011, 06:18 PM ET
What's happening on Jupiter's moon Io?
19 May 2011, 03:18 PM ET
Beginning this month there will be a long series of double shadow transits on Jupiter.
18 May 2011, 01:00 PM ET
Astronomers have discovered a whole new class of alien planet: Jupiter-mass worlds that float through space unbound to any discernible host star.
12 May 2011, 02:01 PM ET
A global "ocean" of molten rock sloshes beneath the surface of Jupiter's moon Io, feeding the fiery satellite's prolific volcanism.
11 May 2011, 01:41 PM ET
Over the next two weeks, the four brightest planets, Mercury, Venus, Mars, and Jupiter, perform a complex dance at dawn
10 May 2011, 02:29 PM ET
Two shining planets will align in the night and daytime skies this week.
06 May 2011, 07:35 AM ET
See Venus, Jupiter, Mercury and Mars together in the predawn sky over the next week.
02 May 2011, 09:20 AM ET
The strange metamorphosis astronomers observed in an asteroid late last year was likely caused by a collision with another space rock.
29 April 2011, 04:25 PM ET
It may be decades before humanity sets foot on Mars, but we're only five years away from sampling space beyond our solar system for the first time.
29 April 2011, 04:24 PM ET
Here are five facts about NASA's twin Voyager 1 and 2 spacecraft, which are set to leave our solar system by 2016 or so.
29 April 2011, 07:06 AM ET
A look at the Voyager mission, which has sent spacecraft to the very edge of the solar system.
28 April 2011, 02:46 PM ET
Skywatching tips for how you can view six planets aligned above the rising sun.
09 April 2011, 08:06 AM ET
Weather and meteor impacts, not ice volcanoes, may actually be reshaping Titan - Saturn's largest moon.
01 April 2011, 05:33 PM ET
Here's a look at how to observe the planets of the solar system in 2011.
31 March 2011, 02:02 PM ET
Ring ripples around Saturn and Jupiter tell a violent story of comet strikes.
22 March 2011, 10:21 AM ET
NASA's budget problems are limiting the agency's choices for flagship missions to the planets.
14 March 2011, 03:59 PM ET
The elusive planet Mercury is bright and visible to skywatchers as NASA's Messenger probe nears the planet.
08 March 2011, 04:22 AM ET
It's a mystery why one of the main bands on Jupiter disappears and reappears.
07 March 2011, 06:32 PM ET
Flagship missions to find life on Mars and study Jupiter's moon Europa may be too pricy for NASA.
06 March 2011, 03:43 PM ET
Jupiter's 12-year orbit around the sun is carrying it out of Earth's evening skies.
03 March 2011, 05:22 PM ET
The new moon of March arrives Friday. Here's how to see the first sliver the new moon.
23 February 2011, 06:24 PM ET
Jupiter will swim between some ocean-themed constellations over the next few weeks.
23 February 2011, 07:09 AM ET
I've never been so close to something that is going so far away.
18 February 2011, 03:20 PM ET
NASA's Messenger spacecraft has snapped a solar system family portrait.
15 February 2011, 03:05 PM ET
A claim by two astronomers of a planet four times the size of Jupiter in solar system is suspect, experts say.
11 February 2011, 05:02 PM ET
New images show dramatic auroras – flares of ultraviolet light – streaming from the planet Jupiter.
07 February 2011, 07:45 PM ET
NASA and Europe's space agency are firming up plans for an ambitious mission to explore Jupiter's moons. NASA and ESA are working to develop the Europa Jupiter System Mission
04 February 2011, 03:40 PM ET
Super Bowl Sunday offers a cosmic post-game show by Jupiter and the moon.
28 January 2011, 11:42 AM ET
The giant object that plowed into Jupiter in the summer of 2009, creating a glowing scar, was most likely an asteroid rather than a comet, new research suggests.
26 January 2011, 05:29 PM ET
Astronomers are saying that the spot on the Planet Jupiter was likely caused by an asteroid in July 2009. See pictures of the spot at SPACE.com.
21 January 2011, 05:02 PM ET
Two Jupiter moons, Io and Ganymede, will cast double shadows on the planet on Jan. 24.
21 January 2011, 04:39 PM ET
One of the most famous examples of the clash between religion and science is the trial of Galileo Galilei.
19 January 2011, 02:20 PM ET
A scorching-hot alien planet may be causing its parent star to inflate and deflate like a balloon.
17 January 2011, 06:35 PM ET
A list of skywatching events in January 2011 that you don't want to miss.