buildings and modules. Notes See also Megascale engineering Non-rocket spacelaunch Niven Ring (in the novel Ringworld''): orbital ring around a star Space tether Skyhook References External links Video: MegaStructures 01: Orbital Rings & Space Elevators Better more recent video: Orbital Rings Paul Birch Web Archive at Orion's Arm String Transport Systems: on Earth and in space (Anatoly Yunitskiy's book) Human spaceflight Space elevator Exploratory engineering Megastructures Space colonization Spacecraft propulsion Spaceflight technology Vertical transport devices Space access Hypothetical technology Magnetic levitation Emerging technologies Articles containing video clips