Retrograde Renegade?

Explanation: The true nature of Saturn's moon Phoebe is revealed in startling clarity in this mosaic of two images taken during Cassini's flyby on June 11, 2004. The image shows evidence for the emerging view that Phoebe may be an ice-rich body coated with a thin layer of dark material. Phoebe's composition is distinctly different from the ice-rich material that formed the intermediate-sized saturnian satellites, and is consistent with formation from the same material out of which Pluto and Triton (archetypical Kuiper-belt objects) formed.


Image credit: NASA/JPL-Caltech/Space Science Institute.