Daphnis, a small moon of Saturn, orbits within the Keeler Gap and exerts a noticeable gravitational pull on Saturn’s rings. This effect creates striking wave-like patterns along the ring edges, offering a visual glimpse into gravitational interactions in planetary systems.
Source: NASA : https://science.nasa.gov/saturn/moons/daphnis/
Nah I just went on GOG and got it for cheaper :)