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The Moon has forty impact basins that larger than 300 km. Earth is about four times the diameter of the Moon and its escape velocity
The Moon has forty impact basins that larger than 300 km.
Earth is about four times the diameter of the Moon and its escape velocity of roughly 10 km/s is about 4 times that of the moon. If the basin forming projectiles approached the Earth and Moon with a velocity of 5 km/s, how many of such large basins should have been made on Earth? Why would this be an underestimate of craters larger than 300 km?
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