A massive asteroid impact changed the balance of the moon forever

The far side of the Moon is riddled with much more craters than the near side that can be seen from Earth. (Image credit: Shutterstock)

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One side of the moon is riddled with far more craters than the other, and researchers finally know why: A massive asteroid that smashed into the moon about 4.3 billion years ago wreaked havoc in the moon’s mantle, according to a new study.

More than 9,000 visible holes cause a hole in moonthanks to a barrage of collisions from meteorites, asteroids and comets over billions of years, according to International Astronomical Union (Opens in a new tab). However, these craters are not evenly distributed across the surface of the Moon. The far side of the moon that people never see Land Because the Moon is gradual (meaning it takes the same amount of time for the Moon to orbit and revolve around the Earth), its focus is much greater on craters than on the visible near side.

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