This is a video of the built in demonstration that is included with Celestia. Celestia is a free, open source program to explore the solar system and beyond in 3-D. Unlike most planetarium software, the user is free to travel about the Universe. The program is a great educational resource for learning about orbits of all the solar system’s planets, moons, their sizes, and the paths of NASA satellites, and much more.

http://www.shatters.net/celestia/
http://en.wikipedia.org/wiki/Celestia

Version 1.5, with several new features, is in beta right now.