- Slingshot Effect, The - how spacecraft accelerate in planetary flybys by gravity assist.
- Advance Space - educational resource offering links to organizations, experts, and references.
- Spacearium, The - weblog and portal providing news commentary about the exploration and development of space with exclusive multimedia shot at Cape Canaveral, discussion forums, galleries, and more.
- Space Calendar - covers space-related activities and anniversaries for the coming year, including links to related home pages.
- Windows to the Universe - user-friendly learning system on the earth and space sciences for use by the general public. From the University Corporation for Atmospheric Research.
- Scientific American: Making Money in Space - exploring the solar system turns out to be the easy part. The next great challenge will be creating profitable space enterprises.
- Millennium Group, The - about many physical phenomena on earth and in the heavens.
- X-SAR User Kit at DLR - 1000 image quicklooks from the shuttle missions SIR-C/X-SAR plus technical documents
- Destination Space - National Geographic Explorer investigates space travel and exploration.
- James Oberg - articles, speeches, columns, and more by the spaceflight operations expert and author.
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