RE: Burning Cosmic Commons (was: ... Fermi's Paradox?)
Fri, 5 Mar 1999 11:35:02 -0800

I'm not too knowledgable about rocketry, but increasing the energy requirements by a factor of two shouldn't by itself be that great a barrier. The energy to reach orbit is around half the energy for escape velocity. We were able to reach orbit in the late 1950s, and reach escape velocity in the mid to late 1960s. So it only took an extra ten years or so. If energy requirements were doubled because we lived on a bigger planet, we could reach orbit with late 1960s technology. I would think that you could then go from orbit to escape velocity by assembling a rocket in orbit, if nothing else. While space exploration would be more costly, it would seem to only slow things down by a decade or two.