Have you ever wondered why the moon looks like Swiss cheese, all covered with huge holes? These holes are called craters, and they are formed when a meteorite impacts a planet or moon. Meteorite is just a fancy name that scientists give to meteors that crash into something!
There are many impact craters on the Earth and the moon that scientists can look at to study meteorites. By studying the size and shape of the crater, these scientists are able to determine how big the meteorite that made it was! This is something that you can learn to do yourself!