The Cassini spacecraft took this picture of the gas giant Saturn, its rings, and its moon Enceladus all in one frame. In this natural color image, Enceladus appears white because its surface is covered with relatively clean water-ice. Below Enceladus are the rings of Saturn, which look golden-brown due to their comparatively high density of dirt. The planet Saturn, in the background, appears relatively featureless with the exception of thin ring shadows visible on the upper left.
Image credit: Cassini Imaging Team, SSI, JPL, ESA, NASA