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Iapetus
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Iapetus

January 12, 2005
One hemisphere of Iapetus is covered with very reflective material while the other hemisphere is covered with some of the darkest material in the solar system. The leading hemisphere of Iapetus (the side that faces the direction of rotation) is very dark, reflecting only about 4 percent of the sunlight that falls on it. The trailing hemisphere reflects about 50 percent of the sunlight that falls on it.


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