The massively overcrowded refuges built on Earth's Moon after the Great Expulsion
Image from Steve Bowers
|Lunar Warrens under construction near Chang-e, using a triangular hub formation
|Copernican Warrens. The 1.8-kilometer diameter hexagons were eventually encircled by 2-kilometer diameter track habitats. The hexagons were then connected by separate transit tunnels built with the future track habitat in mind. Buss tunnels formed the hexagon and star that crossed the interior of the town. Warren tunnels were uniformly arranged north to south to minimize solar exposure and each end of a warren tunnel ended in a buss tunnel. About 25,000 people were resident in each town.