Why don't craters have asteroids in them?

The Moon gets bombarded by a lot of interplanetary material; around 3 metric tons every day. The Moon's atmosphere is considered negligible, rather known as an exosphere, which allows most of this material to impact its surface. read more

Larger craters even get tall mountains at their center, such as the Tycho crater. This is due to a phenomenon similar to the one seen in slow motion videos of water drops. On the Earth, in addition, craters suffer weathering processes due to wind and water currents and also volcanic and tectonic activity. read more

Most known asteroids are found in the Main Belt between Mars and Jupiter, or in the Kuiper Belt past the orbit of Neptune. But there are thousands that orbit at least as close to the Sun as Earth. The vast majority of asteroids are smaller than 1 kilometer in diameter. read more