A November 2, 1979 article by John Yemma in the Christian Science Monitor outlined Jesco Von Puttkamer's vision of America's future in space. Von Puttkamer was a planner for NASA and even consulted on the first Star Trek movie.
By the late '80s or early '90s, a huge solar power satellite may be constructed to beam microwave energy to Earth. And after that, a natural step as Mr. Von Puttkamer sees it, will be space colonies built with nonterrestial material and using solar energy.
Space Colonies by Don Davis
Sport in Space Colonies (1977)
Solar Energy for Tomorrow's World (1980)