21st Century Space Elevators: Advanced Earth-Space Infrastructure: NASA Report on Technology, Plans, Concepts, Materials, Environmental and Safety Issues

NASA workshop on space elevators based on the findings from the Advanced Space Infrastructure Workshop on Geostationary Orbiting Tether “Space Elevator” Concepts. A space elevator is a physical connection from the surface of the Earth to a geostationary Earth orbit (GEO) above the Earth 35,786 km in altitude.