"Space engineers have honed in on one possible site for a lunar
outpost: the Moon's south pole. It's a tactical setting on the rim
of Shackleton Crater, a feature some 12 miles (19 kilometers) in
diameter. There's real estate here that basks in near-perpetual
sunlight. Also, it's a region that is a doorway into the depths of
always dark, Sun-deprived, territory.

What's possibly lurking there in that super-cold darkness is water
ice-portrayed by some researchers as the gold standard for future
exploration on and from the Moon. Yet there is considerable debate
about this resource. If there, such a raw storehouse might be processed
into usable oxygen and hydrogen."

http://www.space.com/scienceastronom...lunar_ice.html


Double-A