NASA says that Pluto has traces of water and ice on its surface. Red-colored frozen surface water is confirmed by combining spectral infrared and visible light data taken by two of New Horizons’ image sensors. The agency also releases a picture of Pluto’s blue sky, which is caused by tiny, sunlight-scattering particles in the atmosphere. Those particles probably begin as molecular nitrogen (which Pluto is constantly emitting) and other trace gases.
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