What is unique about Iapetus?
What is unique about Iapetus? With its distant, inclined orbit, Iapetus is the only large moon from which there is a nice view of the rings of Saturn. As with some other Saturnian moons, Iapetus is in resonance with Saturn's largest moon, Titan, which orbits at 759,200 miles (1,221,850 kilometers). How was Iapetus created? However, a proposed model on the formation of Titan suggests that Titan was instead formed in a series of giant impacts between pre-existing moons. Iapetus and Rhea are thought to have formed from part of the debris of these collisions. Why does Iapetus look like a...