An icy Titanic encounter

Phil Plait took images from NASA's Cassini Saturn probe and put them together to make an animation of the giant moon Titan slipping behind the tinier, icy moon Enceladus. You can see some details in Titan's atmosphere as the smaller moon slides past it, and Phil Plait describe how the motions work.



Note: During the sequence Cassini switched filters, changing the way Titan looks. Phil Plait didn't compensate for any of that; these are raw images right off the spacecraft!