The moon does not experience weather, so footprints remain unless
meteorites or solar wind erase them.

The moon does not experience weather, so footprints remain for a very long
time unless meteorites or solar wind erase them. Although the surface of
the moon is composed of mineral rocks which in some places is as fine as
dust, footprints do not disappear right away because there is no
atmosphere. With no regular wind or rain to erode them, footprints may stay
on the moon for millions of years.