ITHACA, N.Y., July 14 (UPI) -- 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.