Chiron and Friends 
Chiron and other Centaurs (Pholus, Nessus) in astrology, astronomy and mythology. Information on asteroids, minor planets and exoplanets by Zane Stein.
http://www.geocities.com/SoHo/7969/chiron.htmChiron Astrology
Research and writings about Chiron, by Martin Lass. Book excerpts, library and biography.
http://martinlass.com/chiron.htm
The Astrology of The Centaurs
Wide selection of essays and astronomical data on the astrological centaurs, much of which is available also in Spanish. Home also of the freeware calculation program Riyal.
http://www.expreso.co.cr/centaurs/
The Centaur Research Project
Ephemerides, mythological information, research material and news.
http://www.robertvonheeren.de
Treehouse Mountain
Asteroid ephemerides, keywords and lessons, with book list and archives.
http://www.treehousemountain.com/index.htm
Mark Andrew Holmes' Astrology Pages
Extensive personal research into asteroids, comets and other objects.
http://www.geocities.com/mahtezcatpoc/astrolog.html
Magi Society
Advocates the use of planetary geometry, declinations and chiron. Articles, lessons, software and FAQ.
http://www.magiastrology.com/
