This mosaic view of Saturn's moon Phoebe was made from two images taken during Cassini's flyby on June 11, 2004. The image shows evidence for that Phoebe may be made of ice coated with a thin layer of dark material. The small, bright craters are probably fairly young features. This has been observed on other icy moons such as Ganymede at Jupiter. When impactors slammed into the surface of Phoebe, the collisions excavated fresh, bright material, most likely ice. Phoebe is one of many small, irregular moons that orbit Saturn. It is about 125 miles (200 km) in diameter.
NASA / JPL / Space Science Institute