How Long Do Footprints Last on the Moon?
Unlike on Earth, the Moon is geologically dead. There is no erosion by wind or water on the moon.
There is no volcanic activity to change the lunar surface features.
But the Moon is exposed to bombardment by meteorites, which change the surface. So one tiny space rock could easily wipe out a footprint.
And since the Moon has no atmosphere, it's is exposed to the solar wind (a stream of charged particles coming from the sun), but the process of erosion is very, very slow.
Footprints could last a million years and some believe almost as long as the moon itself lasts.
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