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The Great Dark Spot

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The Great Dark Spot

The Great Dark Spot is a large storm on Neptune.

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White clouds fill the boundarys between the light and blue regions, the spinwheel shape says that the storm moves in a counterclockwise shape.The bright cirrus-like clouds of Neptune change rapidly, often forming and dissipating over periods of several to tens of hours.  The Earth is about the same size as the Great Dark Spot. The clouds contain frozen methane.