Mars

Extreme Planet

Mars Facts

Average destince from sun is 142 million miles . Average speed in orbiting sun is 14.5 miles per second . Diameter 4,220 . Tilt of axis 25 degrees . Length of year 687 Earth days . Length of days 24 hours 37 minutes . gravity 0.375 that of Earth . Temperature average -81 degrees F . Atmosphere mostly carbon dioxide some water vapor .
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why is mars red


The red color we see in images of mars is the result of iron rusting . Rocks and soil on the surface of mars contained a dust composed mostly of iron and small amounts of other elements such as chlorine and Sulphur . The rocks and soil were eroded by wind and the dust was blown across the surface by ancient volcanoes .