Xplanet 0.90

The orbital algorithms are taken from the Third Edition of
"Astronomical Formulae for Calculators" by Jean Meeus, published by
Willman-Bell.  The rotational parameters for the other planets and
satellites are taken from Davies et al. (1996), Celestial Mechanics
63, 127--148.

Orbital formulae for Pluto are taken from Paul Schlyter's page at
http://www.m2c3.com/alpocs/tdl1999/schlyter110199/ppcomp.html

The XParseGeometry routine and the rgb.txt file are from the XFree
4.0.2 distribution from the Open Group.

The Helmet Normal font is from the OpenOffice.org distribution.

The day map of the earth is by J. Hasting and can be found at
http://apollo.spaceports.com/~jhasting/images/earthmaps/earthmap2k.jpg

The night map of the earth is taken from
http://visibleearth.nasa.gov/cgi-bin/viewrecord?5826

The brightness and transparency values for Saturn's rings are from
Bjorn Jonsson's page at
http://www.mmedia.is/~bjj/data/saturn/rings.html

Thanks to ... 

James Baughman for the HP-UX patches, help with the autoconf macros,
and some X bug fixes.

Erik Bruhwiler of the Living Planet, Inc., for graciously supplying
the maps for my web page.

Charles Duffy for help with rpm .spec files.

Matthew Francey for help with the projections.

Marcus Harnisch for contributing the tzcoord.pl script.

Kirk Johnson for writing Xearth in the first place.  

Markus Koerner for creating the Xplanet starter program for windows.

Neoklis Kyriazis for porting T.S. Kelso's PASCAL orbit code to C.

Daniel Martin for help with the -orbit option.

Jeremie Petit for some Digital Unix help.

Martin Pool for contributing the Peters projection.

Richard Rognlie for contributing the Ancient and Hemisphere projections.

Henri Simoes for the french translation of the man page.

Per Erik Stendahl and Larry Reeder for catching a bug in
process_args().  Hopefully I won't be seeing too many more mysterious
segfaults. 

Nigel Stewart for getting xplanet compiled using Cygwin on MS
windows. 

Nils Peter Sudmann for contributing the mars marker file.

John Tillema for finding a bug where markers weren't positioned
properly if --center was specified.

James Troup, Jay Treacy, and Gopal Narayanan for their help packaging
Xplanet with Debian.

Jim Wray for help with building the rpm files.

Detlev Zundel for the initial debian packages, man pages, and the
orbit option.

Hari Nair
hari@alumni.caltech.edu
