A planet away from the sun, is ranked fourth in the entire planet. Mars has a diameter about 0.5 times that of Earth, Mars has an internal structure consisting of a solid core with a radius of about 1700 kilometers enveloped by a thick magma mantle is about 1600 kilometers and a crust like Earth. Mars is red because the surface is composed of iron oxide (rust) surface of Mars is full of ravines ravines many big names. Dale Marineris (Valles Marineris) with a length of 4,000 kilometers wide and 600 kilometers deep, eight kilometers addition, Mars has the highest volcano in the solar system name. Olympus Mons (Mount Olympus) 25-kilometer radius of the base roll out 300 kilometers.
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