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Sputnik Planum in Detail:
Release Date: September 17, 2015
Sputnik Planum is the informal name of the smooth, light-bulb shaped region on the left of this composite of several New Horizons images of Pluto. The brilliantly white upland region to the right may be coated by nitrogen ice that has been transported through the atmosphere from the surface of Sputnik Planum, and deposited on these uplands.
Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute