BBC - Space - Features a variety of resources for space exploration and introduction to space flight. Includes many interactive and 3D animated views.

Encyclopedia Astronautica - Comprehensive resource providing articles on most space technology subjects and space flight history.

European Space Industry Directory - ESID is an ESA database of more than 400 space companies and 1000 products.

Heavens Above - Real-time satellite, ISS, and Space Shuttle orbital pass information, maps, and star charts.

International Space Business Council - Maryland research and consulting group focusing on the business of the satellite and space market. Publishes the quarterly magazine, Quest: The History of Spaceflight.

Johns Hopkins University - Developer of a range of spacecraft and scientific payloads providing project overviews, scientific and engineering articles.

Launchdate - Offers an updated list of coming launches, information about ionizing radiation and related resource links.

NASA Skywatch Sightings Calculator - A Java applet that will calculate when spacecraft will be visible in the night sky over the viewer's own location.

Russian Space Web - News and history of the Russian space program by Anatoly Zak, a journalist.

Space and Astronomy Reference Links - Provides a space and astronomy related directory.

Space Projects and Info - Offers a collection of popularized material on space projects and astronomy. Includes forums and merchandising.

Space Travel and Exploration - News, information, and resources about space exploration for the armchair space traveler.

Usenet space archive - Large collection of Google group postings on all aspects of space exploration and development.