“Global map of crustal thickness of the moon derived from gravity data obtained by NASA’s GRAIL spacecraft. The lunar near side is represented on the left hemisphere. The far side is represented in the right hemisphere.”
NASA’s GRAIL mission has solved one of the mysteries of the Moon. “Why is the Moon’s gravity is uneven?… It appears that asteroid impacts have created patches of very high density rock in the subsurface.
“For the past 8 years, NASA astronomers have been monitoring the Moon for signs of explosions caused by meteoroids hitting the lunar surface. [...] They’ve just seen the biggest explosion in the history of the program.”
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