Astronomy Picture of the Day . ... Credit: Cassini Imaging Team , SSI , JPL , ESA , NASA Explanation: Scroll right and cruise above the thin, icy rings of Saturn . ... 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. ... Publications with keywords: saturn rings . Publications with words: saturn rings . ... Saturn s Ancient Rings . ... Enceladus Creates Saturns E Ring . ...