Just before signing off for the evening, I'd like to mention that the Cassini spacecraft is still orbiting Saturn and still taking pictures. This one is an infrared one of the moon Enceladus. NASA's journal page for Enceladus is here.
The blue color is water ice. I don't know much about the rest of them yet.
Update: Here's a link to a NASA archive of Cassini-Huygens pictures.