The Rise and Fall of Star Faring Civilizations in Our Own Galaxy Speculation, based on the Drake Equation, regarding the existence and composition of alien civilizations. http://kurellian.tripod.com/ctcta.html

The Planetary Society A nonprofit organization devoted to the exploration of the solar system and the search for extraterrestrial life. http://www.planetary.org/

Life Extraterrestrial: Life on Other Planets in the Solar System Curriculum framework for comparing Earth to other planets with regard to life. http://www.resa.net/nasa/

Search for ET! Interactive Flash tutorial exploring the possibility of and search for life on other worlds. http://jvsc.jst.go.jp/universe/et_e/index_e.htm

Catalog of White Dwarf Stars McCook and Sion A catalog of spectroscopically identified white dwarf stars, by George P. McCook and Edward M. Sion http://www.willbell.com/software/hypersky/wd1987.htm