Taxonomy upgrade extras:
I ran across this today while looking for information for a story. Since I know others have requested information about space travel and the craft to get you there I thought I would give everyone a heads up! Yes, Gwen I'm talking about you! :) I have no idea as the accuracy but it does seem to go over the basics.
Hey, they mention Heinlein and Clarke so they can't be wrong can they!
Oops! I forgot to put in the site link! My bad! :)