Lunar ice maker, just right for mining. Elevation (left) and shaded relief (right) image of Shackleton, a 21-km-diameter (12.5-mile-diameter) permanently shadowed crater adjacent to the lunar south ... more 
Lunar ice maker, just right for mining. Elevation (left) and shaded relief (right) image of Shackleton, a 21-km-diameter (12.5-mile-diameter) permanently shadowed crater adjacent to the lunar south pole. NASA’s Lunar Reconnaissance Orbiter spac less 
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SPACE.com | Photo By NASA/Zuber, M.T. et al., Nature, 2012
Wed, Jul 11, 2012 7:49 AM EDT