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10 things you didn't know about hurricanes

By: Laura Moss on Oct. 20, 2010, 1:15 p.m.
Jupiter's Great Red Spot

Photo: NASA Goddard Photo and Video

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Longest hurricane

Jupiter’s Great Red Spot is actually a high-pressure storm akin to a hurricane on Earth, but the spot is enormous — so big that three Earths could fit inside it. The storm has been churning for at least 400 years — that's when humans first observed it through a telescope — making it the longest continuous hurricane mankind has encountered. The storm is driven by Jupiter’s internal heat source, and it continues to churn because it never passes over land.