These are caused by numerous encounters with asteroids and comets.
Xem thêmOur solar system is made up of a star, eight planets and countless smaller bodies such as dwarf planets, asteroids and comets.
Xem thêmThese craters are from impacts with comets and asteroids over billions of years.
Xem thêmThese moons are thought to be captured asteroids from the asteroid belt.
Xem thêm