From NASA page: The inner parts of the rings move around Saturn faster than the outer parts, all in accordance with Kepler’s third law for small objects revolving about a massive, larger one. They orbit the planet with periods ranging from 5.8 hours for the inner edge of the C ring, to 14.3 hours for the outer edge of the more distant A ring. Since Saturn spins about its axis with a period of 10.6562 hours, the inner parts of the main rings orbit at a faster speed than the planet rotates, and the outer parts at a slower speed. Now my questions: Why are the inner rings moving faster than rotation of Saturn? Is there some expected relation between the rotation of a planet (or asteroid) and rotation of the particles in the rings? Or is the speed of rings rather related to the gravity of the planet (or asteroid) and not related to rotation of the planet?