The backs for these cards came from the U.S. National Aeronautics
and Space Administration.  The original images can be found at:
http://antwrp.gsfc.nasa.gov/apod/archivepix.html
along with a lot more just like 'em.

The penguins are by "The PAPA" <papalini@biancaneve.ing.unifi.it>
and can be found at:
http://biancaneve.ing.unifi.it/~papalini/
and there's a lot more of those too.

Copyright (C) 1999 T. Kirk <grania@mailcity.com>

This card set is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.