"Paul F. Dietz" wrote in message
...
John Savard wrote:

Solar power satellites are dangerous and expensive - only an L5 habitat
could make them economically.

I'm not convinced. I've seen a conceptual design of a modular
multi-gigawatt SPS that would be built with only terrestrial
materials, yet would require launching only a few thousand tons
into LEO. Nothing would need to be manufactured in orbit.

Paul


And I could take that thing out with a simple two-stage rocket and a bag of
gravel. Welcome to the 21st century.