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The soft soil exposed when wheels of NASA's Mars Exploration Rover Spirit dug into a patch of ground dubbed "Troy" exhibit variations in hue visible in this image, in which the colors have been stretc...
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Rock Under the Belly
07.01.09 -- Engineers placed a rock underneath the test rover at NASA's Jet Propulsion Laboratory, Pasadena, Calif., on July 1, 2009, to more closely simulate Spirit's predicament on Mars.
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Mission News
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Free Spirit: Rock Under the Belly
Engineers placed a rock underneath the test rover at NASA's Jet Propulsion Laboratory, Pasadena, Calif., on July 1, 2009, to more closely simulate Spirit's predicament on Mars.
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Free Spirit: Test Rover Rolls In
After several days of preparing a sloped area of soft, fine soil to simulate Spirit's current sandtrap on Mars, the rover team drove a test rover into the material on June 30, 2009.
Mission Features
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Mars Rovers Earn Congressional Kudos
03.11.09 - Congress passed a resolution Wednesday recognizing scientific contributions of NASA's Mars Exploration Rovers, and commending the JPL and Cornell University teams.
Video Gallery
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Free Spirit - Into the Sandbox
Rover Project Manager John Callas explains how getting a test rover stuck in a sandbox on Earth may help get Spirit out of a predicament on Mars.
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JPL's 'Free Spirit' Update
While the Spirit rover is embedded on Mars, engineers are working to create a 'Mars-scape' on Earth to test an escape plan.
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Mars Exploration Rover Update
Being a rover on Mars , one can encounter trying times and triumph. Spirit and Opportunity are currently experiencing both.
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Rover Undergrad
Internships at JPL helped one woman build her career as a software engineer working on robotics.
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Mars Exploration Rover Update
Both rovers have had a little trouble recently, but now they're both back on the road and driving again.
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 "Rover testing at NASA's Jet Propulsion Laboratory")
 "JPL's 'Free Spirit' Update")
 "Image of Mars")
 "Lucy Abramyan")
 "Spirit's view on Mars")
Multimedia Gallery
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Still Roving on Mars
After five years, the Mars Exploration Rovers are still studying Mars. Take a closer look at how they work.