... Credit: NASA , JPL , Space Sciences Institute Explanation: What's causing unusual jagged shadows on Saturn's rings? ... As a result, Saturn's moons now commonly ca s t long shadows onto the rings . ... Now Saturn's rings have been known to be made of particles for hundreds of years , but these particles have so far escaped direct imaging. ... Publications with keywords: Saturn - Saturn rings . ... Moons Beyond the Rings of Saturn . ... Regulus and the Red Planet . Moons and Rings Before Saturn . ...