EJECTA PLUME
What happens when a rocket crashes into the Moon? Scientists are watching for clues about lunar impacts
In 2009, NASA deliberately crashed LCROSS into a permanently shadowed lunar crater; the mission detected water in the resulting debris plume
3,900-kg SpaceX rocket to slam into the Moon on August 5: When and where to watch the rare impact from the US and Canada, why astronomers are tracking it and what happens next
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