• Wave Shadows in Motion in Saturns A Ring • The little moon Daphnis and its entourage of waves on the edge of the Keeler gap in Saturn's rings cast long shadows in this movie created from images taken as the planet approaches its mid-August 2009 equinox. This movie is a sequence of 10 images, each taken about one minute 30 seconds apart. The small moon Daphnis (8 kilometers or 5 miles across) occupies an inclined orbit within the 42-kilometer (26-mile) wide Keeler Gap in Saturn's outer A ring.