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The Solar System




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Mars

 

Mars, the god of war, was the namesake of the 4th planet from the sun. It is smaller than Earth, but has two moons, Phobos and Deimos. In size, it is the 7th biggest planet in our solar system. The diameter is 4,228 miles long, or 6,804 kilometers. Mars' perihelion totals to 206,644,545 km and its aphelion is 249,228,730 km. The surface gravity is 3.69 m/s2. It's distance from Earth is .52 AU, while its distance from the sun is 1.52 AU. A day on Mars is close to 1.025 Earth days and its year is 687 Earth days. The atmosphere is composed of 95% carbon dioxide. The surface gravity on the planet Mars is 3.69 m/s2, while its density rounds to about 3.934 g/cm3. Even though you may think that Mars may be warm, the temperature is -63 degrees celsius!

Many believe that Mars may have contained life before. A European mission to Mars, Mars Express Orbiter, recently reported that there is a good concentration of methane. This means that an unstable gas like methane is an indicator that life may have existed. Volcanic eruptions, comet impacts, and microorganisms methanogens, could be unproven indicators of life also.