SUMMARY: NASA's Mars Global Surveyor took several photos of Mars' moon Phobos on June 1, 2003. The first image is a low-resolution shot of Phobos about to set behind the Red Planet; while the second, higher resolution image shows incredible details on the moon's surface. Phobos orbits Mars three times a day at an average distance of only 9,378 kilometres - if you stood on the surface of Phobos, Mars would nearly fill the sky above.

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