Space.com: a website that provides updated space news, discussion boards, extensive photo galleries, and items for sale.

ScienceDaily.com: the latest research news and science breakthroughs updated daily.

NewScientist.com: official website of the science magazine featuring international news, ideas and innovation.

PopSci.com (Popular Science): official website of the magazine about current science and technology.

Wikipedia.org: an encyclopedia with content created and maintained by its users.

DavidSzondy.com

Astronomy Links:

Atlas of the Universe

Digital Sky LLC: posters and prints.

Space Exploration Links:

NASA.gov: official website of theAmerican space agency.

ESA.int: official website of the European space agency.

JAXA.jp: official website of the Japanese space agency.

Space Colonization Links:

ASI.org (Artemis Society International): Private Enterprise on the Moon.

Lifeboat.com (Lifeboat Foundation): movement dedicated to the safeguarding of humanity.

LUF.org (The Living Universe Foundation): movement dedicated to the future of space colonization and the spread of life through out the galaxy (Formerly the First Millennial Foundation).

Janek.Kozicki.pl: personal website of an engineer from Poland, Janek Kozicki, who invented the concept of inflatable Martian base.

The Future: illustrated scenario of future space colonization.

NSS.org (National Space Society): independent, educational, nonprofit organization dedicated to the creation of a spacefaring civilization.

Planetary.org (The Planetary Society): a nonprofit organization devoted to the exploration of the solar system and the search for extraterrestrial life.

Permanent.com: movement advocating Rapid development of space using material from asteroids near Earth and from the Moon.

IslandOne.org (Island One Society): propulsion systems, business ideas, archives of space meetings and journals, and political advocacy for the space frontier.

SpaceElevatorBlog.com

LiftPort.com

Scaled.com (Scaled Composites LCC): composite aircraft design, prototyping and flight test.

SpaceX.com: Space Exploration Technologies Corporation.

GalacticSuite.com: a private space hotel company.

BigelowAerospace.com: a general contractor that is providing design, engineering, fabrication, testing, assembly and marketing of future space complexes.

Science-Fiction Links:

SciFi.com: Site of the Cable TV Science Fiction Channel. Features a weekly magazine, daily news, web directory, book reviews and bulletin board system.

Space Art Links:

Marilynn Flynn Tharsis Artworks: Space Art and Astronomical Illustration. Images for publication, prints and art cards available.

http://www.flickr.com/photos/flyingsinger/

http://flyingsinger.blogspot.com/

Abalakin

Geir Lanesskog

Michael Carroll

Raymond Cassel

Bob Eggleton