Ring Scan . ... Credit Copyright: Cassini Imaging Team , SSI , JPL , ESA , NASA Explanation: Scroll right and cruise above the thin, icy rings of Saturn . ... To help track your progress, the rings are labeled below, along with the distance from the center of the gas giant in kilometers. Major ring gaps are labeled above. The alphabetical designation of Saturn's rings is historical and related to their order of discovery ; rings A and B are the bright rings separated by the Cassini division. ...