Mercury Not Too Hot For Polar Water Ice?

Mercury is the closest planet to the sun; it is therefore the least likely place to find a reservoir of water ice. It seems surprising, then, that water ice may be present inside its shady craters.

March 22, 2012
5:18 PM EDT
WATCH VIDEO: NASA smashes the LCROSS and spent Centaur rocket into the moon in a search for water on the lunar surface.


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