Why is the Moon covered with craters?
The Moon is covered with craters because throughout its history it has been bombarded by a lot of meteorites. All of the moons and planets in our solar system have been hit by meteorites. This was especially true in the past, when there was much more debris in our solar system than there is today. On Earth, we only see a few meteorite craters because most have been eroded away by wind, rain, and other forces. Also, since Earth has an atmosphere, most meteors burn up due to friction with the atmosphere before they reach the ground. On the Moon, where there is no atmosphere, there is nothing to prevent meteorite impacts and there is no wind or rain to erode the impact craters away. Even the footprints of the astronauts who landed on the Moon over 30 years ago are still there.
