Debate Rages Over Moon Water

Debate Rages Over Moon Water
This mosaic picture of the moon was compiled from mages taken by the Galileo spacecraft in 1992. The north polar region is near the top part of the mosaic, which also shows Mare Imbrium, the dark area on the left; Mare Serenitatis at center; and Mare Crisium, the circular dark area to the right.
(Image: © NASA.)

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