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The clouds of Uranus form bands that run of the top of the planet (relative to the picture) to the bottom, due to Uranus lying on its side. These bands are shades of light blue, light green, and white. A small, slightly-darker blue patch is visible on the right.

Dark Spot on Uranus

Whirling winds and churning clouds in the atmosphere of Uranus formed a dark feature large enough to span two-thirds of the United States. Astronomers used the Hubble Space Telescope to take the first definitive images of this dark spot on Uranus in 2006. The elongated feature measures 1,100 miles by 1,900 miles (1,700 kilometers by 3,000 kilometers).

Image Credit: NASA, ESA, L. Sromovsky and P. Fry (University of Wisconsin), H. Hammel (Space Science Institute), and K. Rages (SETI Institute)
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