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Around this core would be constructed an enormous space station, dwarfing the 200-foot wheel von Braun wanted to create. Romicks colony would consist of a huge, zero-gravity cylindrical dry dock over 1500 feet long and 1000 feet in diameter. It would have a total volume of about 3 billion square feet. At one end would be a 1500-foot rotating disc that would be inhabited by 20,000 people.
Toroidial Colonies In the 1970s, scientists at NASA's Ames Research Center conducted three different studies into how humanity might build colossal space colonies in the form of giant stations. See the wild ideas put to form in these vintage NASA artist illustrations. Here, an artist depicts the exterior view from one wheel-shaped space colony concept.