Iapetus

Your spacecraft has finally reached the outer rim of the Saturnian system to orbit and visit the surface of Iapetus. Enter an inclined orbit 3.56 million kilometers away from the ringed gas giant to analyze a world split in half by thermal runaway physics. Prepare to land your exploration vessel directly inside the massive, battered impact basins of Roncevaux Terra, trek across the pitch-black carbonaceous dust plains of Cassini Regio, and stand at the base of the mysterious 13-kilometer-high equatorial mountain ridge. This interactive cosmic archive will guide you through the real astrophysics, density mechanics, and geological mysteries of this ancient, walnut-shaped world as you explore its freezing surface.