Firefox is a graphical web browser developed by the Mozilla Corporation, and a large community of external contributors. It is the second most popular internet browser. Among the numerous innovative features included in the program, stands the multi-tab browsing, the download manager window, an easy and fast way to clear private data as well as a high protection against malevolent scripts. What makes it superior to its competitors is the fact that the browser can easily be customized by the use of numerous ad-ons, free to chose and download.

Celestia  is a real-time visual space simulation. Great, almost like real, graphics. With this program you can travel to space! ...for free!

After having installed the program you may want to install aditional add-ons to have new locations in space (satellies, space station, other star systems, science-fiction stuff, etc.). You can get these on the following websites: