Space Science in the Yahoo! Directory

Space Scientists Online
Provides new and exciting information from space sciences and collects relevant information from previous space science projects.
quest.arc.nasa.gov/sso
Slingshot Effect, The
How spacecraft accelerate in planetary flybys by gravity assist.
www.dur.ac.uk/bob.johnson/SL
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.
www.sciam.com/article.cfm?articleID=00098CE9-715F-1C71-9EB7809EC588F2D7&sc=...
Space, Planetary, and Astronomical Cyber-Experience (SPACE)
Easy to navigate guide to space and astronomy related web sites. Produced by the National Space Society.
www.nss.org/spacelinks
Google Book Search: Space Tourism
Offers scientific chapters and articles on space tourism written by Michael Van Pelt, describing everything from what it feels like to be a tourist in space, to be hurled into orbit on top of a controlled explosion, to float around in a spacecraft, and to be able to look down on your hometown from above the atmosphere.
books.google.com/books?id=pjiuMbDxsJIC&dq=space+tourism&printsec=frontcover...