Last week, it was ice canyons; now, as an anonymous reader writes: The latest images to come from NASA's New Horizons space probe's encounter with Pluto last July 2015 is of a methane snow-capped mountain range around that dwarf planet's equator located in the region known to scientists as Cthulhu. Cthulhu starts from the west of Sputnik Planum, a great nitrogen ice plain, and stretches 1,850 miles long and 450 miles wide, half way around Pluto's equator, making it slightly larger than the state of Alaska. Cthulhu appears to be a dark surface on all of the images returned by New Horizons. Scientists theorize that the darkness is caused by thorins, molecules that result when methane is exposed to sunlight. Cthulhu is a complex region, containing both smooth and heavily cratered plains and the mountain range already mentioned.
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