File:Saturn's Rings Close Up from Voyager 1.jpg

English: This image is an example of some of the amazing complexity that is evident in the photographs of the rings of Saturn. At the upper right is the outer edge of the ring system close to a narrow division in the rings (the Encke Gap). The curved group of gaps and faint material near the bottom is the Cassini division; in this exposure it is evident that the division is not empty but merely less completely filled with material than the rest of the rings. The dense portions of the rings appear very bright because they are overexposed in this particular photograph. The black “dots” are reference marks for image processing. Precise measurements of the light of a star as it passed behind the rings, as seen from the Voyager 1 spacecraft, revealed that as many as 10,000 concentrations of material may exist within the entire ring system. Other measurements made by the spacecraft indicate that the rings consist of particles of water ice ranging in size from tens of centimeters (about 1 foot) to 5 meters (about 16 feet).