Thursday, September 08, 2011

GRAIL and the Mystery of the Missing Moon

Source - NASA Science News for Sept. 7, 2011

Did our planet once have two moons? Some researchers say so. Moreover, the missing satellite might still be up there--splattered against the far side of the Moon. NASA's GRAIL mission, due to launch on Sept. 8th, could help confirm or refute the "two moon" hypothesis.


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