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The Great White Spot is a storm that lasts for how long?
Question
#76016. Asked by Polar,,x. (Feb 18 07 5:04 AM)
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Sofie

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The Great White Spot, also known as Great White Oval, on Saturn, named by analogy from Jupiter's Great Red Spot, is a name given to periodic storms that are large enough to be visible by telescope from Earth by their characteristic white appearance. The spots can be several thousands of kilometers wide.
The phenomenon is somewhat periodic at 28.5-year intervals, when Saturn's northern hemisphere tilts most toward the Sun.
http://en.wikipedia.org/wiki/Great_White_Spot
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