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Pluto's methane mountains Pluto as seen from data taken by New Horizon's flyby in 2015 of the dwarf planet, with a close-up view of the Pigafetta Montes mountain range. The colorization on the right indicates the concentrations of methane ice, with the highest concentrations at higher elevations in red, decreasing downslope to the lowest concentrations in blue. NASA/JHUAPL/SwRI and Ames Research Center/Daniel Rutter