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Originally Posted by RalofTyr
The Moon did have an atmosphere at one time. After the collision, massive volcanism was present on the Moon, so, how long did the atmosphere stick around? Was it as massive as Venus'?
Seconldy, the Moon had to have been struck with many comets as Earth. Where did the water go? Could there not be underground reserves of water on the Moon?
Also, have we found any evidence of running water on the Moon? A dry riverbed and such?
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Earth has only a fraction of it's water from comets and Moon was not massive enough to retain much water, simply, it evaporated into space except maybe for some ice on the bottom of craters in enternal shadow.
No dry riverbeds.