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image:101710:1::0
Image uploaded by Albert Baer

2011-12-05 17:51:34

This diagram compares our own solar system to Kepler-22, a star system containing the first "habitable zone" planet discovered by NASA's Kepler mission. The habitable zone is the sweet spot around a star where temperatures are right for water to exist in its liquid form. Liquid water is essential for life on Earth. (NASA)

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