Saturn moon color mystery explainedIthaca, N.Y. (UPI) Jul 14, 2011 U.S. astronomers say they've figured out origins of the mysterious colors of Saturn's moon Iapetus, bright white on one side and coal-black on the other. The two-faced color pattern has long mystified astronomers but researchers from Cornell University say they have an explanation - Iapetus' dark "face" is caused by dust thrown off by Phoebe, another of Saturn's moons, which is coating one side of Iapetus. Since Iapetus doesn't rotate with respect to Saturn, it always presents the same ... read more