Whirling winds and churning clouds in the atmosphere of Uranus formed a dark feature large enough to span two-thirds of the United States.
<p>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). 
</p><p>For more information, visit: hubblesite.org/images/news/release/2006-47
</p>
Credit: NASA, ESA, L. Sromovsky and P. Fry (University of Wisconsin), H. Hammel (Space Science Institute), and K. Rages (SETI Institute)
NASA Hubble
CC BY 2.0
<a rel="nofollow" class="external free" href="https://www.flickr.com/photos/144614754@N02/46455057294/">https://www.flickr.com/photos/144614754@N02/46455057294/</a>