Guardian Unlimited | Special reports | The cheap way to the stars - by escalator: "f climbing a stairway to heaven sounds like too much hard work, then a conference of 70 scientists and engineers opening in Santa Fe today may offer hope of a more leisurely way into space.
In two days of discussions, the scientists aim to turn into a reality an ambition that has been around for at least a century: the creation of a space elevator that would deliver satellites, spacecraft and even people thousands of kilometres into space along a vertical track.
Engineers say that recent advances in materials science - particularly in the development of carbon nanotubes - mean that such a system, which first gained widespread attention when the science fiction writer Arthur C Clarke described it in his 1979 novel Fountains of Paradise, is no longer pure science fiction.
Mr Clarke - who once said a space elevator would only be built 'about 50 years after everyone stops laughing' - was due to address the scientists at the Santa Fe conference today by satellite link from his home in Sri Lanka.
The American space agency Nasa is no longer laughing. It is putting several million dollars into the project under its advanced concepts programme.
At the heart of a space elevator would be a cable reaching up as far as 100,000km from the surface of the Earth. The earthbound end would be tethered to a base station, probably somewhere in the middle of the Pacific ocean. The other end would be attached to an orbiting object in space acting as a counterweight, the momentum of which would keep the cable taut and allow vehicles to climb up and down it.
A space elevator would make rockets redundant by granting cheaper access to space. At about a third of the way along the cable - 36,000km from Earth - objects take a year to complete a full orbit. If the cable's centre of gravity remained at this height, the cable would remain vertical, as satellites placed at this height are geostationary, effectively hovering over the same spot on the ground."
In two days of discussions, the scientists aim to turn into a reality an ambition that has been around for at least a century: the creation of a space elevator that would deliver satellites, spacecraft and even people thousands of kilometres into space along a vertical track.
Engineers say that recent advances in materials science - particularly in the development of carbon nanotubes - mean that such a system, which first gained widespread attention when the science fiction writer Arthur C Clarke described it in his 1979 novel Fountains of Paradise, is no longer pure science fiction.
Mr Clarke - who once said a space elevator would only be built 'about 50 years after everyone stops laughing' - was due to address the scientists at the Santa Fe conference today by satellite link from his home in Sri Lanka.
The American space agency Nasa is no longer laughing. It is putting several million dollars into the project under its advanced concepts programme.
At the heart of a space elevator would be a cable reaching up as far as 100,000km from the surface of the Earth. The earthbound end would be tethered to a base station, probably somewhere in the middle of the Pacific ocean. The other end would be attached to an orbiting object in space acting as a counterweight, the momentum of which would keep the cable taut and allow vehicles to climb up and down it.
A space elevator would make rockets redundant by granting cheaper access to space. At about a third of the way along the cable - 36,000km from Earth - objects take a year to complete a full orbit. If the cable's centre of gravity remained at this height, the cable would remain vertical, as satellites placed at this height are geostationary, effectively hovering over the same spot on the ground."
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