Uranus is the seventh planet from the Sun and the third largest planet in the solar system. Uranus is named after the Greek god of the same name, the god of the sky.
NASA's Voyager 2 is the only spacecraft to have visited Uranus. On 24 January 1986, the spacecraft—which had been launched about 8 years earlier, having already visited Jupiter and Saturn— passed within about 81,500 km of the clouds on Uranus' surface. Voyager 2 then continued on to visit Neptune some 2 years later.
With the exception of Venus, all the solar system planets rotate on their axes from west to east. Although they are all slightly tilted, Uranus is tilted to such an extreme degree that it's effectively rotating on its side.
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