dunes on pluto

The planet Pluto is pictured in a handout image made up of four images from New Horizons' Long Range Reconnaissance Imager (LORRI) taken in July 2015 combined with color data from the Ralph instrument to create this enhanced color global view. NASA/JHUAPL/SwRI/Handout. Credit: Reuters

Wondrous Dunes on Pluto Are Made of Grains of Frozen Methane