> Practically every sentence of the article is wrong including multiple errors in the title. >> But the Columbia study differs from previous proposal in an imp

> Practically every sentence of the article is wrong including multiple errors in the title. >> But the Columbia study differs from previous proposal in an important way: instead of building the elevator from the Earth’s surface (which is impossible with today’s technology), it would be anchored on the moon and stretch some 200,000 miles toward Earth until hitting the geostationary orbit height (about 22,236 miles above sea level), at which objects move around Earth in lockstep with the planet’s own rotation. I see. The difference is they proposed to build their Moon space elevator on the Moon, while others have proposed building the Moon space elevator on Earth... /s Also, obviously, even if the Lunar tether reaches the _altitude_ of geosynchronous orbit, it will not have the _velocity_ of geosynchronous orbit (it will have the angular velocity of... the Moon). Since the Moon orbits once every 30-ish days and the orbital period of a geosynchronous orbit is 1 day, an object at the end of this tether would not be in geosynchronous orbit. I'll not bother to check and see if that orbit would have an apogee above 100, or 0, km. In other news, Wet Streets Cause Rain.