This has nothing to do with Celestia itself, but I think you`ll like this
Came across one of the most beautiful desktop-enhancers / screensavers in a long time: `Dreamscapes` by superxstudios
In short it`s a set of realtime 3d rendered space travelling scenes with sound! It actually are scenes of their strategy-game FAR GATE - that demo is also downloadable
You can find it at http://www.superxstudios.com/ - The demo is free to download an impressive - the full version is worth the money.
For the impatient ones I put it on Kazaa - look for `desktop dreamscapes complete` (7,790 kb)
just start it up - sit back - relax - enjoy.....
Here are some screenshots...
Let me know what you think of it and what your favorite scene is ( mine is `planetary flyby`)