the space elevator has to extend far beyond geostationary orbit. The upper portion may be regarded as the mass which keeps the cosmic sling taut, as it whirls round the Earth every 24 h. This mass ...

In order to find the key for the elevator, you'll have to move through the Teacher’s classroom. Crouch down and move quietly from desk to desk while she’s facing the chalkboard. Once you’ve gotten ...

The very minimum requirement for a space elevator is, obviously, a cable strong enough to support its own weight when hanging from geostationary orbit down to earth, 36000 km below. That is a very ...