Another stellar image from Cassini. Words not needed here. :)
Pan and moons like it have profound effects on Saturn's rings. The effects can range from clearing gaps, to creating new ringlets, to raising vertical waves that rise above and below the ring plane. All of these effects, produced by gravity, are seen in this image.
Pan (17 miles or 28 kilometers across), seen in image center, maintains the Encke Gap in which it orbits, but it also helps create and shape the narrow ringlets that appear in the Encke gap. Two faint ringlets are visible in this image, below and to the right of Pan.