ssystem is an OpenGL Solar System simulator with Sun, nine
planets, and a few major satellites.  Background stars are
also included.

WWW: http://socios.las.es/~amil/ssystem/
     http://www.wam.umd.edu/~kamelkev/
     http://plasma.gsfc.nasa.gov/Ssystem/
     http://www.skysys.org/mirrors/ssystem/