This is the animated version of my "Alien planet" image.
I wanted to see how it looks in motion. In the original image I used a cloud layer for the ring in the foreground. This is OK for a single image, since it renders extremely long. But for the animation I faked it by using the semi transparent ring object itself, which looks a bit like the cloud layer and renders way faster. I added some more small rocks for the ring and additionally I animated the rotation of the larger rock instances. Since I already had edited lots of them, the rotation doesn't look too uniform. I have no idea, if the debris in a planet ring moves at all, but I took the artistic freedomgive it some motion.