According to members of NASA’s New Horizons science team, the icy surface of Pluto’s Sputnik Planum basin is being constantly renewed by a process called convection that replace older surface ices with fresher material. Sputnik Planum basin: this scene, which is about 250 miles (400 km) across, uses data from New Horizons’ Ralph/MVIC instrument. Image credit: NASA / Johns Hopkins University Applied Physics Laboratory / Southwest Research Institute. The...
