Monday, October 4, 2010

APOD 1.4

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This picture is of one of Jupiter's moons, Io.  Io is often called the strangest moon in the universe due to its bright yellow color.  This yellow tint comes from sulfur and silicate rock.  Io also has many active volcanoes.
They erupt because Jupiter's gravitational pull causes friction on the moon.  This friction causes heat which melts the interior and causes molten rock to explode out of the volcanoes.  These volcanoes are very active and erupt regularly effectively turning the moon inside out.

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