Earth science on Mars

"All systems go!" I said cautiously with a long sigh of relief. I had approved plans for the first soil analysis that would give humankind clues to the past and future habitability of Mars.

NASA's Mars Odyssey orbiter watches comet fly near

The longest-lived robot ever sent to Mars came through its latest challenge in good health, reporting home on schedule after sheltering behind Mars from possible comet dust.

Electric sparks may alter evolution of lunar soil

The moon appears to be a tranquil place, but modeling done by University of New Hampshire and NASA scientists suggests that, over the eons, periodic storms of solar energetic particles may have significantly altered the properties ...

Image: Light toned deposit in the Aureum Chaos region on Mars

The High Resolution Imaging Science Experiment (HiRISE) camera aboard NASA's Mars Reconnaissance Orbiter acquired this closeup image of a light-toned deposit in Aureum Chaos, a 368 kilometer (229 mile) wide area in the eastern ...

A dark and dusty avalanche on Mars

Mars may be geologically inactive but that doesn't mean there's nothing happening there—seasonal changes on the Red Planet can have some very dramatic effects on the landscape, as this recent image from the HiRISE camera ...

Webcam on Mars Express surveys high-altitude clouds

An unprecedented catalogue of more than 21 000 images taken by a webcam on ESA's Mars Express is proving its worth as a science instrument, providing a global survey of unusual high-altitude cloud features on the Red Planet.

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