Atmosphere and Weather: For many years, it was generally understood that Uranus was a bland planet. However, recent analysis from the Hubble Space Telescope shows Uranus to be a weather dynamic planet, characterized by huge storms (some covering half or more the United States in size), banded cloud cover and the brightest cloud tops in the outer solar system. In late 2006, the Hubble telescope discovered a dark cloud on Uranus. This storm was two thirds the size of the United States. Clouds enshroud the planet with a latitudinal banding like Jupiter and Saturn, although much more faint. The average temperature of the clouds is -315 degrees F and ammonia and methane ice crystals make up the cloud composition. It has been recently found that wind speeds on Uranus range from 90 to 360 mph and the planet's average temperature is a frigid -353 degrees F. The coldest temperature found in Uranus' lower atmosphere so far is -371 degrees F., which rivals Neptune's frigid temperatures. Findings from Hubble reveal that clouds circle Uranus at over 300 mph. Shown at right, this near infrared picture taken by the Hubble Telescope reveals the bright cloud tops on the left side of the disk. Like the other gas giants, Uranus has an atmosphere composed of mostly hydrogen, followed by helium and a little methane.