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- Feb 2019
the flyby showed Pluto to be home to cryo- or ice volcanoes, soaring mountains, and flat plains. Its surface is dominated by volatile ices, with large variations in color and albedo. New Horizons also took a look at Charon, the largest of Pluto’s five moons. Charon appears to be loaded with just water ice, absent the other frozen gasses found on Pluto. The most striking feature on this moon is a 600-mile long rift, longer than the Grand Canyon.
How did I not know that Pluto had 5 moons? Really, I'm slacking on my solar system knowledge!