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Mars

Mars: Over the course of a single day, the wide angle cameras of the Mars Orbiter Camera (MOC) system take 24 pictures--12 red and 12 blue--that are assembled to create a daily global map. Such global views are used to monitor the martian weather and observe changes in the patterns of frost and dust distribution on the surface.
(Image credit: NASA/JPL)

Mars is the fourth planet from the Sun. A terrestrial planet made of mostly rocks and metals. Also known as the Red Planet because of its reddish appearance due to large amounts of rust.