Here's why:

* No atmosphere: The moon has no atmosphere to speak of, so there's nothing to burn up incoming meteoroids.

* Constant bombardment: The moon is constantly being bombarded by meteoroids of various sizes.

* Evidence: Apollo missions brought back samples of lunar rocks, and many of these rocks are actually meteorites that crashed into the moon.

* Lunar craters: The vast majority of craters on the moon are caused by meteorite impacts.

So, the moon is essentially a giant meteorite collection! It's a fascinating place to study the history of our solar system.