Figure 7-27 Saturn’s Ring System (a) Photographed with the Sun behind Saturn, the inner and intermediate regions of Saturn’s ring system are shown to be very different from each other. Beyond the F ring, the particles are dust and pebble-sized. (b) Another view of the inner and intermediate rings, where subtle color differences are indicated. (c) Superimposed on this Cassini image are labels that indicate how far the rings extend into the moon system of Saturn. Titan (off image on right) is 1.2 million km (750,000 mi) from the center of Saturn.