Mars is part of the solar system, and is the fourth planet from the Sun is 55 million miles from Earth at its closest point. It has two small moons: Phobos and Deimos. In the sky, Mars appears as a red star, its color is due to corrosion or oxidation of its surface. After Mercury, is the smallest of the planets in our system. Its gravitational force is smaller than Earth's. At 50 degrees of latitude toward the poles, winter temperatures are below 123 degrees Celsius, because the carbon dioxide from the atmosphere freezes in sediments that are the polar caps. The average surface temperatures do not reach 33 degrees Celsius. In summer, the Heat-reach 17 degrees Celsius. The planet's surface is desert. Strong winds cause erosion and sedimentation of surface materials. To the north there are few craters, but in the Southern Hemisphere they are important because ancient and intense meteoric bombers.
It is made up of carbon dioxide (95%), nitrogen (27%), argon (1.6%), oxygen (0.2%) and traces of carbon monoxide, gases and water vapor.
The weakness of the atmosphere, the chemical effects of oxidizing substances (such as hydrogen peroxide) and ultraviolet radiation that is exposed to the surface indicate that there is no life on Mars. The Martian year is 687 days, and every day is just over half an hour longer than Earth's.