Mars is the fourth furthest away from the sun and is recognized by its reddish color. Mars is also very much like the Earth. " More than any other planet in the solar system, Mars has characteristics that make it an Earth-like world "(Grolier, 1992). One thing that is very similar to Earth is the rotation period. Mars rotation period is only thirty seven minutes longer than the Earth's. This would explain why Mars has significant seasonal changes just as Earth does. It is believed that the Planets 5 difference between winter and summer on Mars is even greater than on Earth. Mars is extremely hard to understand ....

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