Free Space Simulation Software Download

This educational software "Celestia", let us travel the universe in 3D. This software is almost the same as Google Mars, Google Moon, and Google Sky. This free software can be operated for Windows, Mac OS, Linux. CBS Television Show used this software in season 4, episode 22,"In The Dark", also NASA and ESA in their educational and outreach program.
We really thanks that this software is free to download. Chris Laurel is the author of this software, released in 2001.

After downloading, check first the menu "Help" and "Run Demo" and don't forget to read "User Guide". Here is the Demo I captured, I made it in GIF Format.

Website to download : http://shatters.net/celestia/download.html