bill—maplewood:

In the 1970′s the Princeton physicist Gerard O’Neill with the help of NASA Ames Research Center and Stanford University held a series of space colony summer studies which explored the possibilities of humans living in giant orbiting spaceships. Colonies housing about 10,000 people were designed and a number of artistic renderings of the concepts were made. (More images and higher resolutions are available from here). (Via) 

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