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Uranus
This picture of Uranus was compiled from images returned Jan. 17, 1986, by the narrow-angle camera of Voyager 2. The spacecraft was 9.1 million kilometres (5.7 million miles) from the planet, several days from closest approach. The picture has been processed to show Uranus as human eyes would see it from the vantage point of the spacecraft. It is a composite of images taken through blue, green and orange filters. The darker shadings at the upper right of the disk correspond to the day-night boundary on the planet. Beyond this boundary lies the hidden northern hemisphere of Uranus, which currently remains in total darkness as the planet rotates. The blue-green colour results from the absorption of red light by methane gas in Uranus' deep, cold and remarkably clear atmosphere. The Voyager project is managed for NASA by the Jet Propulsion Laboratory.