Levitation is the process by which an object is suspended against gravity, in a stable position, by a force without physical contact. This can be achieved through jets of gas pushing upwards against the object (as in air hockey), or pushing downwards from the object (as in helicopters, VTOL aircraft, and hovercraft). A sphere can be stably levitated in a stream of air without any type of control system, if conditions are right. These effects are due to Bernoulli's principle. This was merchandised as a toy, circa 1960. Objects with the right properties can be levitated without even indirect contac ...

Read more here: » Levitation: Encyclopedia - Levitation

See also:

Space elevator, Space elevator - Orbital tethers, Space elevator - Physics and structure, Space elevator - Base station, Space elevator - Cable, Space elevator - Climbers, Space elevator - Counterweight, Space elevator - Launching into outer space, Space elevator - Extraterrestrial elevators, Space elevator - Construction, Space elevator - Traditional way, Space elevator - Brad Edwards' proposal, Space elevator - Other designs, Space elevator - Failure modes and safety issues, Space elevator - Satellites, Space elevator - Meteoroids and micrometeorites, Space elevator - Corrosion, Space elevator - Weather, Space elevator - Sabotage, Space elevator - Vibrational harmonics, Space elevator - In the event of failure, Space elevator - Van Allen Belts, Space elevator - Economics, Space elevator - Political issues, Space elevator - History, Space elevator - Fiction, Space elevator - Novels and Fairy tales, Space elevator - Anime Comics and Manga, Space elevator - Videogames, Space elevator - Movies and TV series, Space elevator - Others

Read more here: » Space elevator: Encyclopedia II - Space elevator - Construction

The construction of a space elevator would be a vast project, requiring advances in engineering and physical technology. NASA has identified "Five Key Technologies for Future Space Elevator Development": Material for cable (e.g. carbon nanotube and nanotechnology) and tower Tether deployment and control Tall tower construction Electromagnetic propulsion (e.g. magnetic levitation) Space infrastructure and the development of space industry and economy Two different ways ...

See also:

Space elevator, Space elevator - Non-tether space elevator concepts, Space elevator - Orbital tethers, Space elevator - Physics and structure, Space elevator - Base station, Space elevator - Cable, Space elevator - Climbers, Space elevator - Counterweight, Space elevator - Launching into outer space, Space elevator - Extraterrestrial elevators, Space elevator - Construction, Space elevator - Traditional way, Space elevator - Brad Edwards' proposal, Space elevator - Other designs, Space elevator - Failure modes and safety issues, Space elevator - Satellites, Space elevator - Meteoroids and micrometeorites, Space elevator - Corrosion, Space elevator - Weather, Space elevator - Sabotage, Space elevator - Vibrational harmonics, Space elevator - In the event of failure, Space elevator - Van Allen Belts, Space elevator - Economics, Space elevator - Political issues, Space elevator - History

Read more here: » Space elevator: Encyclopedia II - Space elevator - Construction

The construction of a space elevator would be a vast project, requiring advances in engineering and physical technology. NASA has identified "Five Key Technologies for Future Space Elevator Development": Material for cable (e.g. carbon nanotube and nanotechnology) and tower Tether deployment and control Tall tower construction Electromagnetic propulsion (e.g. magnetic levitation) Space infrastructure and the development of space industry and economy Two different ways ...

See also:

Space elevator, Space elevator - Orbital tethers, Space elevator - Physics and structure, Space elevator - Base station, Space elevator - Cable, Space elevator - Climbers, Space elevator - Counterweight, Space elevator - Launching into outer space, Space elevator - Extraterrestrial elevators, Space elevator - Construction, Space elevator - Traditional way, Space elevator - Brad Edwards' proposal, Space elevator - Other designs, Space elevator - Failure modes and safety issues, Space elevator - Satellites, Space elevator - Meteoroids and micrometeorites, Space elevator - Corrosion, Space elevator - Weather, Space elevator - Sabotage, Space elevator - Vibrational harmonics, Space elevator - In the event of failure, Space elevator - Van Allen Belts, Space elevator - Economics, Space elevator - Political issues, Space elevator - History

Read more here: » Space elevator: Encyclopedia II - Space elevator - Construction