<_description> SSystem is a GL Solar System simulator. It simulates flybys of Sun, the nine planets and a few major satellites, with four camera modes. Written by Raul Alonso. This is not included with the XScreenSaver package, but is packaged separately. Note: SSystem does not work as a screen saver on all systems, because it doesn't communicate with xscreensaver properly. It happens to work with some window managers, but not with others, so your mileage may vary. SSystem was once available at <http://www1.las.es/~amil/ssystem/>, but is now gone. You may still be able to find copies elsewhere. SSystem has since evolved into two different programs: OpenUniverse (http://openuniverse.sourceforge.net/) and Celestia (http://www.shatters.net/celestia/). Sadly, neither of these programs work with xscreensaver at all. You are encouraged to nag their authors into adding xscreensaver support!