Mercury looks like the Earth's moon, covered in craters, from collisions of comets and meteoroids. Some of the terrain is smooth, but from Earth you really only can see a rough surface. These craters come in many sizes and shapes. The biggest crater is called Caloris Basin and probably came from a crash that happened long ago. Caloris Basin is the largest basin in the solar system.
Along with the grayish- brown coloring of the planet, Mercury