So I’ve run into these videos before, but never realized they were part of a masterful series. The University of Nottingham has created 60+ ~5 minute videos each devoted to a symbol used in physics and astronomy.

http://www.sixtysymbols.com/

The Saturn and Jupiter videos were both great.

And a recent video all about Saturn’s most recently discovered (and very faint) ring. This is easily the best description I’ve heard of the ring and how it likely formed:
http://www.youtube.com/watch?v=_XgcPso9VHg

Check them out… they’re short, interesting, well made, and awesome.