Launch Costs

> From: Robert
> its been proven, but no one is interested in building it.

It's been proven it would be 100+ miles across, and that acccelerating a
rocket to those kinds of speeds in that kind of circular tunnel before
letting it go is not entirely simple from a safety point of view. And yes,
it will still be a rocket because of atmospheric loss and orbital burns.
Chemical rockets at present is the most mature technology available. And
that is unfortunately unlikely to change baring the construction of:
*A space elevator
*A truely safe nuclear lightbulb rocket
*Antigravity

John