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Comet ISON goes green

As NASA and the European Space Agency prepare their remote photojournalists – Mars Express, Mars Reconnaissance Orbiter and the Curiosity and Opportunity rovers – to capture photos of Comet ISON's flyby ...

Sep 30, 2013
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Image: Crescent Mimas

A thin sliver of Mimas is illuminated, the long shadows showing off its many craters, indicators of the moon's violent history.

Sep 16, 2014
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Image: Martian sand dunes in spring

(Phys.org) —Mars' northern-most sand dunes are beginning to emerge from their winter cover of seasonal carbon dioxide (dry) ice. Dark, bare south-facing slopes are soaking up the warmth of the sun.

Mar 07, 2014
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