Stuart Levy (slevy@ncsa.uiuc.edu) wrote the Orrery at the University
of Minnesota Geometry Center in 1996.

Mark Phillips (mbp@geomtech.com) slightly modified and packed version 0.9.3.

Further slight changes by Claus-Justus Heine
<Claus-Justus.Heine@IANS.Uni-Stuttgart.DE> for version >= 0.9.4.
