Mysterious Spokes in Saturns Rings . ... Credit Copyright: CICLOPS , JPL , ESA , NASA Explanation: What causes the mysterious spokes in Saturn's rings? ... Oddly, the spokes were conspicuously absent from initial images sent back by the robot Cassini spacecraft now orbiting Saturn. ... Some recent images from Cassini like that shown above have now finally shown the enigmatic spokes superposed on Saturn's B ring . ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...