A rocky planet the planets closest to the sunβ€”mars, earth, venus, and mercuryβ€”are made mostly of rock. The rocky planets all formed in our inner solar system. Their geological history.

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Following in the same year were the first uncontrolled impact (mars 2). A view of the surface of mars shows an unusual feature β€” a seemingly square crater bounded on three sides. Please see the explanation for more detailed information.

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