A Slice of Iapetus

A crescent Iapetus shows, at the top right of this image, some of the dark terrain characterizing this unusual Saturnian moon.Scientists continue to investigate the nature of the moon's surface. See PIA08384 to learn more.Lit terrain seen here is on the Saturn-facing side of Iapetus (1471 kilometers, 914 miles across). North on Iapetus is up and rotated 5 degrees to the left.Scale in the original