As the movie starts, 4 moons move down the right side as a group of 3 followed by the fourth. Epimetheus, furthest out, leads the group. Prometheus, and barely visible Atlas, move inside the F-ring. Pandora, lags behind, just outside the F-ring. On the left, Janus, out from the rings like Epimetheus, moves up. Later in the movie, Janus enters the gap and eventually reappears on the right. Likewise, the quartet of moons moves across the gap and up the left side. Through out the movie, knots of material move round the F-ring. (Hint: Step through the movie frame by frame to see some of this detail).

The movie compresses five and a quarter hours of Cassini observations. Exposures of 1.2 seconds were taken about 12 minutes apart. The images were captured as part of a search for small moons near Saturn's F-ring. Contrast was enhanced and the rings were overexposed to make the moons visible. Saturn has been taken out of the image and the left and right sides have been moved together to reduce the movie's width. Source: NASA Planetary Photo Journal PIA06076

April 2005