Mars Rover Curiosity Photo Reveals Crescent Moon Phobos

SPACE.com
Mars Rover Curiosity Photo Reveals Crescent Moon Phobos
NASA's Mars rover Curiosity snapped this photo of the largest Martian moon Phobos during a Mars sky observing session. Phobos is Mars' largest moon, but only 14 miles across. Image released Sept. 26, 2012.
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