Lindsey, Clark S.

Provides comprehensive directory with separate sections on amsats, satellite observing, collecting, and space tourism. Frequently updated.
http://www.hobbyspace.com/

Frank Knight's Space Links

Provides a large space directory by a space enthusiast.
http://users.adelphia.net/~franknite/spaclink.htm

James Oberg's Pioneering Space

Provides article collection and research on the Russian and US space programs, Mir and the International Space Station, by an author of numerous books in the space domain.
http://jamesoberg.com

SpaceWeb

Links and news extracts from the web, offered by a space enthusiast.
http://www.geocities.com/thespaceweb

Brian's Space Hotlist

Provides a comprehensive directory for a wide spectrum of space issues, well organized by topics.
http://www.ssl.umd.edu/space/

Gordon's Space Site

Provides an article collection and directory by a space enthusiast.
http://www.geocities.com/gbinguy/space.html

Gunter's Space Page

Information on rockets, launch vehicles, missiles, satellites, rocket engines, astronauts.
http://www.skyrocket.de/space

Greene, Nick

Offers a varied set of news, extracts and directory related to space and astronomy written by a space enthusiast.
http://space.about.com/index.htm

Balettie, Roger

Former NASA Flight Dynamics Officer providing memoirs on mission control, manned space missions, essays, interviews, and space directory.
http://space.balettie.com/

futureSPACE

An astronomy student's vision of space exploration, and a comprehensive collection of related material.
http://www.futurespace.de/

Sven's Space Place

Provides a resource for space history, radio tracking and technology by a space enthusiast. Frequently updated.
http://www.svengrahn.pp.se/

Spacewatch.UK

Resource providing a comprehensive collection on multimedia, directories, science, space weather and other material on space and astronomy.
http://website.lineone.net/~tony.eckerman/homepage.html

Space Tourism

Provides publications and contacts of a researcher.
http://www.robert-goehlich.de/

Satellite Database

Features a space enthusiast's downloadable directory of launched objects.
http://www.rolfisoft.de

NavMonkey

Offers a Ph.D. researcher's collection of material related to GPS systems.
http://navmonkey.com/

Inside KSC

Offers overview of the activities at the Kennedy Space Center, Florida.
http://www.insideksc.com/

Musgrave, Story

Biography, interviews, philosophy, poetry and photos by a Shuttle astronaut.
http://www.spacestory.com/

Science and Space

Web log offering various articles and links on space exploration.
http://ko-science.motime.com/

Leubands, Frank

Offers collection of personal photos of space meetings and sites.
http://www.leuband.de/index_en.htm

Ulivi, Paolo

Provides extensive material on planetary exploration history world wide, by an Italian space history enthusiast.
http://utenti.lycos.it/paoloulivi/

Viehböck, Franz

Offering biography, images by an Austrian astronaut that participated in the Austro Mir mission in 1991.
http://www.franzviehboeck.com/index_e.html

Zsidisin, Greg

Collection of essays and opinions on space technology.
http://gzspace.com/

Wright, Michael P.

Collection of autographs from all astronauts. Includes space memorabilia from flights.
http://www.mpwright.com/

Rocket and Space Technology

Offers a comprehensive introduction to the basics of most of space technology by a space enthusiast.
http://www.braeunig.us/space/