Mars is one of the nice planets of the solar system. It is one of the four inner planets, and is the fourth planet from the sun. The orbit of Mars is larger than that on Earth, since it is about 50 million miles father from the sun. Mars’ average distance from the sun is 142 million miles, which is 229 million kilometers. Its diameter is 4,215 miles, which is 6,783 kilometers, its period of revolution is 687 days, and it has two satellite moons.
Mars does have an atmosphere; however, since Mars is much smaller than the earth, its surface gravity is only 38% of the Earth’s. With such a low force of gravity, Mars cannot hold a very dense atmosphere. The Martian surface air pressure is much less than the Earth’s. Its very thin atmosphere an
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