Global map of Dione’s surface. NASA/JPL-Caltech/SSI/LPI
Saturn’s moon Dione (pronounced DEE-oh-nee) is a heavily-cratered, 700-mile-wide world of ice and rock, its surface slashed by signature “wispy lines” that mark the bright faces of sheer ice cliffs. But Dione has some strange colorations too, evident here in a global map created in 2014 from Cassini images. Its leading half—the side that faces “forward” as it moves around Saturn in its tidally-locked orbit—is pale and bright, while its trailing hemisphere is stained a brownish color, the result of surface interaction with charged particles in Saturn’s magnetic field.
Read more from ESA here: Space in Images – Global colour mosaic of Dione and see more pictures and news about Dione here. Tagged: Cassini, Dione, ESA, moon, Saturn, solar system, space