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8 outstanding images of the planet Uranus

By: Katherine Butler on April 11, 2011, 1:25 p.m.
Uranus, the blue-green giant


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Blue-green giant

Uranus is the seventh planet from the sun in our [skipwords]solar[/skipwords] system. This giant ball of gas and liquid is about four times as large as Earth, and it's covered by methane clouds. It is believed that Uranus is covered in ammonia and water oceans surrounding a rocky core believed to be the size of Earth. In 1986, Voyager 2 passed by the planet, illuminating the blue-green gas giant as never before. (Text: Katherine Butler)