Transcript: The rings of Saturn are spectacular and highly complex. The Voyager space probes showed the existence of thousands of individual ringlets, with the widest gap being Cassini's division, which was discovered in the seventeenth century. The particle sizes within the rings range from golf ball size up to about the size of a house. Larger blocks of material are broken down by collisions. The material is mostly made of frozen ices rather than dark, rocky material, so the rings are relatively pale in color. The most spectacular thing about the rings is their aspect ratio. The rings are 270,000 kilometers from edge to edge but only 100 meters thick. They are millions of times thinner than they are wide. It's as if you had a pizza that was less than the thickness of a human hair.