Planetary rings consist of millions of chunks of rock and ice all on independent orbits close to the planet.
Binary stars orbit each other.
Often the two stars have nearly equal mass. Star Clusters Star clusters are gravitationally bound aggregates of thousands to millions of stars. Any individual star is bound to the cluster by the sum total of the gravity of all of the other stars. The stars move about on random complex orbits, but never collide since they are incredibly tiny relative to the empty space in between. The Galaxy Like stars in star clusters, the hundreds of billions of stars in our Galaxy each travel on their own independent orbit.