Developer of a range of spacecraft and scientific payloads providing project overviews, scientific and engineering articles.

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

Provides a space and astronomy related directory.

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

News, information, and resources about space exploration for the armchair space traveler.

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

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

Offers a collection of popularized material on space projects and astronomy. Includes forums and merchandising.

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

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

Features a Russian project to sky-jump from space (over 40km altitude). Includes background of the project initiator, Mogamed Tolboev.

ESID is an ESA database of more than 400 space companies and 1000 products.

Large collection of google group postings on all aspects of space exploration and development.