As the Sun crossed through the plane of Saturn's rings during the nights of November 18 to 23, 1995, about 200 CCD images of Saturn's satellite and ring system were obtained by a team using the Indiana University coronagraphic adaptor and re-imaging module on the 3.5-m WIYN telescope at Kitt Peak National Observatory near Tucson, Arizona. In this 93K MPEG clip, also available in a smoothed, noise-reduced Quicktime version (428K), the Sun is on the opposite side of the rings from Earth, and the rings are a "negative" image of their usual appearance. The C ring and Cassini Division are bright, while the A and B rings are dark. The animated clip shows the small Saturnian moons Epimetheus (top of the East ansa, moving East), Prometheus (bottom of the East ansa, moving West), and Janus (bottom of the West ansa, moving West). Toward the end of the movie, Pandora emerges from behind the mask, heading West along the bottom of the West ansa, and Mimas passes into the shadow of the rings.
Source: NASA JPL, Sun Crossing of Saturn's Ring Plane, Image ID: ringmoon.mpg
This 1.1-MB Quicktime movie shows the motion of the dark radial features known as "spokes," first observed on Saturn's rings by Voyager. The spokes are features as long as 20,000 km that move in patterns on the B ring, as can be seen in this movie. For more information, see the source site given below.
Source: NASA JPL, Voyager Ring Spokes Animation, Image ID: saturn_spoke.qt (converted to video codec)