procellarum basin

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'Man in the Moon' Was Made by Austria-Sized Asteroid

Japanese researchers arrive at conclusion by analyzing minerals

(Newser) - The moon's Procellarum basin—the dark part seen from Earth sometimes said to resemble a "man in the moon"—was likely formed when an asteroid the size of Austria slammed into the lunar surface some 3.9 million years ago, a team of Japanese scientists has concluded....

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