Celestia - Free Opensource Space Simulation to Explore the UniverseSep 12, 2008, 06:02 (0 Talkback[s])
[ Thanks to susegeek for this link. ]
"Celestia is used in homes, schools, museums and planetariums around the world, it also is used as a visualization tool by space mission designers. Celestia runs on Windows, Linux, and Mac OS X. The latest stable version is 1.5.1."