ScienceCast 29: Did Earth Have Two Moons?🌕🌑
1 month ago
97
Science
Space
NASA
SMD
Science Mission Directorate
planetary science
GRAIL
moon
lunar gravity
origins
Did our planet once have two moons? Some researchers say so. Moreover, the missing satellite might still be up there--splattered across the far side of the Moon. NASA's GRAIL mission could help confirm or refute the "two moon" hypothesis.
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