In a study published May 31, researchers announced the discovery of a dune system on the dwarf planet Pluto. The study team spotted ridges on Sputnik Planitia, the huge plain that makes up the left lobe of Pluto’s famous “heart,” thanks to imagery taken by NASA’s New Horizons mission in July 2015. The features look similar to Earth dunes, but Pluto’s aren’t made of sand; the wind-blown grains are probably frozen methane. [Full Story: Pluto Has Dunes, But They’re Not Made of Sand]]
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