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8 remarkable images of Neptune

By: Katherine Butler on Jan. 12, 2011, 12:05 p.m.
detail of Triton

Photo: NASA/Jet Propulsion Lab/U.S. Geological Survey

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Mosaic of Triton

This global color mosaic of Triton was taken by Voyager 2 in 1989. Like Earth, Triton is thought to have a nitrogen-rich atmosphere, and it is the only satellite in the solar system that has a nitrogen ice surface. The blue-green band across Triton is thought to be nitrogen frost, while the pink is thought to be methane ice.