Mercury
Mercury: It is the closest planet to the sun, so it orbits the sun very quickly just in 88 days. Its Surface is gray to orange in color and it is covered with craters. It is a small planet, just 4850 kilometers in diameter. The side of its Surface which is facing the sun is extremely hot as 700 ok..
Mercury is smaller and closer to the Sun than Earth.
Mercury is the smallest planet in the Solar System and the closest to the Sun.