Solar System

By: SPACE.com Staff Published: 05/29/2012 01:02 PM EDT on SPACE.com Two small asteroids zipped close by Earth in back-to-back flybys of the plan...

By: Mike Wall Published: 05/26/2012 06:24 AM EDT on SPACE.com One of the Red Planet's most mysterious landforms is probably 2 billion years olde...

By: SPACE.com Staff Published: 05/24/2012 07:04 AM EDT on SPACE.com The late-afternoon sun lights up a huge Martian crater in a spectacular new ...

By: Natalie Wolchover Published: 05/22/2012 12:54 PM EDT on Lifes Little Mysteries A planet four times the size of Earth may be skirting the edges...

By: Mike Wall Published: 05/21/2012 11:36 AM EDT on SPACE.com Sunday's "ring of fire" solar eclipse may be history, but skywatchers ha...

How savvy are you about solar eclipses? You already know that eclipses like the one that will be visible in the U.S. on Sunday occur when the moon...

By: Charles Q. Choi Published: 05/16/2012 01:22 PM EDT on SPACE.com Stars like our sun can release "superflares," explosions of up to ...

By: Mike Wall Published: 05/16/2012 01:04 PM EDT on SPACE.com Observations of next month's historic Venus transit may eventually help astronomer...

Even though NASA’s Dawn spacecraft has been orbiting the asteroid Vesta since mid-2011, the rocky world still yields surprises--from its complex geo...

By: Mike Wall Published: 05/15/2012 07:42 AM EDT on SPACE.com A NASA sun-watching spacecraft will have an unbeatable view of June's historic Ven...

By: Clara Moskowitz Published: 05/10/2012 02:09 PM EDT on SPACE.com Detective astronomers have discovered at least one unseen alien planet, and po...

PASADENA, Calif. -- The Mars rover Opportunity is on the go again. After spending nearly five months conducting experiments in one spot, the NASA rov...

By: SPACE.com Staff Published: 05/03/2012 12:57 PM EDT on SPACE.com The European Space Agency will launch a deep-space mission to explore the icy ...

By: Nola Taylor Redd Published: 05/03/2012 02:06 PM EDT on SPACE.com Beneath their rugged exterior, some Martian rocks could be hiding life, sci...

By: Geoff Gaherty Published: 04/27/2012 01:59 PM EDT on SPACE.com Step outside any night this week about an hour after sunset and have a look at...

By: Denise Chow Published: 04/26/2012 05:29 PM EDT on SPACE.com A star already known to host five alien planets may actually be home to a whopping...

By: Joe Rao Published: 04/23/2012 05:59 PM EDT on SPACE.com On Tuesday evening (April 24), skywatchers will be treated to yet another eye-catchi...

By: Mike Wall Published: 04/18/2012 01:07 PM EDT on SPACE.com Humanity needs to be much better prepared for massive solar storms, which can wrea...

By: SPACE.com Staff Published: 04/17/2012 10:03 AM EDT on SPACE.com A stunning new photo from the Hubble Space Telescope has captured an unprece...

By: Joe Rao Published: 04/13/2012 08:36 PM EDT on SPACE.com The planet Venus is now at its peak of visibility in the evening sky this weekend, mak...

WASHINGTON – For the first time, scientists have captured images of auroras above the giant ice planet Uranus, finding further evidence of just how ...

By: Geoff Gaherty Published: 04/11/2012 05:04 PM EDT on SPACE.com When amateur astronomers reflect on the most memorable sights of their lifetim...