Although Epimetheus appears to be lurking above the rings here, it's actually just an illusion resulting from the viewing angle. NASA photo

NASA's Cassini spacecraft also captured this view of Saturn's moon Epimetheus. NASA photo

Although Dione, foreground, and Enceladus are composed of nearly the same materials, Enceladus has a considerably higher reflectivity than Dione. NASA photo

Although Enceladus and Saturn's rings are largely made up of water ice, they show very different characteristics. NASA photo

NASA's Cassini spacecraft zoomed by Saturn's icy moon Enceladus on Oct. 14, capturing this stunning image of the moon's north pole. NASA