Craters

Mars is a terrestrial planet with a thin atmosphere, having surface features like those of the impact craters of the Moon, and valleys, deserts, and polar ice caps of Earth.

Unlike many other planets which "self-heal" through natural geological processes, the surface of Mercury is covered in craters.

Most Mercurian craters are named after famous writers and artists.

The surface of Mercury is covered with craters.

These craters are from impacts with comets and asteroids over billions of years.

One of the largest craters is called Caloris Basin.

Mercury has many craters on its surface.

These craters are from rocks hitting Mercury long ago.