Space colonies are man-made, hollow planetoids in orbit. The colonists live permanently on the interior.
The Lewis One space colony design is intended to improve on the 10,000 inhabitant designs of the mid-70s. The new design features large shielded micro-g construction bays, low-g agriculture near the rotation axis to reduce the length of cylindrical colonies, large micro-g visitor and recreation areas, space viewing, and low-g recreation.
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Postscript of paper.