Scientists have an ingenious explanation for the strange ridge belting Saturn's outermost moon, Iapetus.

Extensive analyses and modeling of Cassini imaging and heat-mapping data have confirmed and extended previous ideas that migrating ice, triggered by infalling reddish dust that darkens and warms the surface, may explain the mysterious two-toned "yin-yang" appearance of Saturn's moon Iapetus.

PASADENA, Calif., Oct. 7 /PRNewswire-USNewswire/ -- NASA's Spitzer Space Telescope has discovered an enormous ring around Saturn -- by far the largest of the giant planet's many rings.

NASA's Spitzer Space Telescope has discovered an enormous ring around Saturn -- by far the largest of the giant planet's many rings.

Astronomers have theorized that the unexplained terrain on one of Saturn's icy moons might have happened when the moon went from a relatively fast-spinning body to one spinning more slowly.