Tomorrow, to join a space station in orbit, we shall take the space elevator. Transport of passengers as goods, it will be of real vertical trains which will borrow the space elevator.
- http://science1.nasa.gov/science-news/science-at-nasa/2000/ast07sep_1/
- http://www.space.com/24739-space-elevator-tether-technology.html
- http://sservi.nasa.gov/articles/the-space-elevator-concept/