10 February 2014, 01:42 PM ET
This vivid space wallpaper shows a region of the planet’s northern hemisphere known as Hephaestus Fossae – after the Greek god of fire – that was imaged by the high-resolution stereo camera on ESA’s Mars Express orbiter on Dec. 28, 2007.
08 February 2014, 10:13 AM ET
Skywatchers have a lot to look up for in February 2014. Weather permitting, diligent observers should be able to spot a plethora of planets, comets and stars in the night sky this month.
07 February 2014, 09:12 AM ET
The Mars Surveyor Climate Orbiter undergoes testing to simulate launch conditions.
06 February 2014, 03:38 PM ET
NASA's Mars rover Curiosity has snapped its first photo of Earth from the surface of the Red Planet, an amazing image that also includes the moon. See the photos here.
06 February 2014, 03:14 PM ET
On Tuesday at precisely 12:55 p.m. EST (17:55 UTC), Mars rover Curiosity successfully breached the crest of the dune in “Dingo Gap.” The 1 meter-high dune stands between the rover and a smoother route to the mission’s next science target
06 February 2014, 11:24 AM ET
A dramatic, fresh impact crater on Mars dominates this spectacular space wallpaper taken by the High Resolution Imaging Science Experiment (HiRISE) camera on NASA's Mars Reconnaissance Orbiter on Nov. 19, 2013.
06 February 2014, 09:27 AM ET
The planets location in the nightsky are pinpointed (you'll need binoculars or a telescope to spot Uranus and Neptune). Also, Comet's Lovejoy, Siding Spring and Linear can be viewed.
06 February 2014, 12:33 AM ET
NASA's Mars Reconnaissance Orbiter photographed the crater on Nov. 19, 2013. Scientists know the feature formed sometime between July 2010 and May 2012, because other MRO observations show big changes in the area between those two dates.
04 February 2014, 04:00 PM ET
For two weeks this January, Crew 133 was a caretaker of a habitat on "Mars." The Mars Desert Research Station is a 1,200-square-foot facility in the middle of the Utah desert and is the property of the Mars Society.
04 February 2014, 10:40 AM ET
While working at the Mars Desert Research Station in rural Utah for three weeks in January, Crew 133 needed to observe several rules to make the simulation as realistic as possible.
04 February 2014, 07:00 AM ET
The 3-foot-high dune separates Curiosity from a valley that may provide a smooth route to Mount Sharp, the rover's ultimate science destination. Curiosity's handlers are studying the new photo as they map out the rover's next steps.
03 February 2014, 04:50 PM ET
The mystery of a strange rock on Mars that suddenly appeared in front of NASA's Opportunity rover has warped into the final frontier. Even 'Star Trek' actor William Shatner wants to know what's going on.
03 February 2014, 11:12 AM ET
As if NASA didn't have enough to worry about, the U.S. space agency is now faced with the scandal of the century — they’re being sued for not investigating a bona fide life form on Mars! And it all is due to a mystery rock found by the rover Opportunity.
31 January 2014, 10:49 AM ET
Viking, the planetary landing spacecraft, is under assembly.
31 January 2014, 10:39 AM ET
The left-front wheel of NASA's Curiosity Mars rover shows dents and holes in this cool space wallpaper taken during the 469th Martian day, or sol, of the rover's work on Mars (Nov. 30, 2013).
30 January 2014, 02:30 PM ET
Curiosity's handlers are driving the 1-ton rover more cautiously now and are checking the condition of its wheels frequently. The rover team is also considering accessing a smoother, less rocky route to the foothills of Mount Sharp.
30 January 2014, 01:10 PM ET
Comet Siding Spring will approach within 86,000 miles of Mars on Oct. 19, potentially putting on a great show for NASA's Red Planet spacecraft. But the dust shed by the comet may also endanger the agency's Mars orbiters.
30 January 2014, 06:45 AM ET
Astrobiologists are developing 'intelligent' instruments that could help future robotic explorers make their own decisions about where and how to collect data on Mars and other solar system bodies.
29 January 2014, 09:46 PM ET
To prepare a rover for Mars, where do you test it on Earth?
29 January 2014, 01:01 PM ET
Astronomers have come to realize that the asteroids in the main belt between Mars and Jupiter are incredibly diverse in size and composition, implying that they were scattered here and there by migrating planets long ago.
28 January 2014, 05:25 PM ET
MarsCrew134's crew engineer Ewan Reid is testing a rover carrying a terrain mapping pair of stereo cameras and equipment to test long range robotic control during a two week human Mars mission simulation in high altitude Utah.
27 January 2014, 07:12 PM ET
If astronauts are to terraform Mars, agriculture may rely on Earth microbes improving Martian soil.
27 January 2014, 09:30 AM ET
MarsCrew134 is simulating the exploration of Mars in high altitude Utah. Crew scientist Michaela Musilova is adding organisms from Earth's extreme environments to the Utah soil samples to create organics, and important step in terraforming Mars.
24 January 2014, 06:45 PM ET
Even ‘Star Trek’ actor William Shatner wants to know about the weird “jelly doughnut” rock on Mars found by NASA’s Opportunity rover. Steve Squyres, Principal Investigator of the Mars Exploration Rover Program explains.
24 January 2014, 06:19 PM ET
This week, a team of scientists and engineers began a two-week field simulation of a mission to Mars.
24 January 2014, 02:48 PM ET
MarsCrew134 is simulating the life of engineers and scientists in the harsh conditions of Mars. Crew Commander Ashley Dale talks about the mission and introduces his team.
24 January 2014, 10:06 AM ET
After 10 years on the Martian surface, the rover continues to deliver new discoveries about the 4th planet from the Sun. Here are some of the highlights.
24 January 2014, 10:02 AM ET
The harsh conditions have created issues with a piece of machinery that has not been serviced by human hands in over 10 years. The Opportunity team discusses what they have had to contend with.
24 January 2014, 09:05 AM ET
Some of the engineers were still in school when the the Spirit and Opportunity landed on Mars. Today they are living out their dream and extending the original 90-day mission to 10+ years. Hear their stories.
24 January 2014, 07:00 AM ET
Rover deputy principal investigator Ray Arvidson, of Washington University in St. Louis, submitted a personal Spirit and Opportunity Top 10 list to SPACE.com to mark the mission's 10 years of Mars exploration.
24 January 2014, 06:00 AM ET
For 10 years the robots have roved across Mars, making exciting discoveries about water in the planet's past.
23 January 2014, 02:01 PM ET
Mars may have been capable of supporting microbial life for hundreds of millions of years in the ancient past, recent findings from NASA's Opportunity and Curiosity rovers suggest.
23 January 2014, 02:01 PM ET
NASA's Spirit and Opportunity rovers touched down on Mars in January 2004, tasked with 90-day missions to search for signs of past water activity. Rover project manager John Callas reflects on a decade of discovery from this mission, which is still going
23 January 2014, 12:50 PM ET
Martian art and Red Planet science meet in a new exhibition celebrating 10 years of Mars exploration with two twin rovers.
23 January 2014, 11:29 AM ET
In January 2014, a team of scientists ventured to the Utah desert for a two-week Mars mission simulation. See what the mock Mars mission was like for SPACE.com contributor Elizabeth Howell.
23 January 2014, 08:45 AM ET
Fresh of a mock mission to Mars, SPACE.com contributor Elizabeth Howell will host an exciting "Ask Me Anything" session on Reddit today (Jan. 23) to answer your questions on what it is like to experience a simulated trip to the Red Planet.