I didn’t know the rings were made out of debris. This stuff is pretty much way over my head. In honor of Rhea, here’s a video link from Feetwood Mac
http://video.google.com/videoplay?docid=3348329991530931753&q=rhiannon+fleetwood+mac+site%3Avideo.google.com&total=11&start=0&num=10&so=0&type=search&plindex=0
Feetwood = Fleetwood!