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How many asteroids,comets,meteors,meteorites,meteorids have hitting the earth?
Answer 1:

This depends on the size of the meteorite or particle you mean - thousands of dust grains hit the Earth every day (we call them shooting stars). Bigger things hit much less often.

Also, most of the things that hit the Earth did so in the early history of the solar system. Space is a good deal emptier now than it was then.



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