The Bernal Sphere design is very similar to that used in the science fiction series Babylon 5, although the original Bernal Sphere design is much smaller, only 1 mile in circumference, and can house 10,000 people. Click here for a more detailed description of the Bernal Sphere.
Bernal Sphere agricultural rings seen in cross-section. Farming occurs in the upper layers, and animal husbandry in the lower layers where gravity is a little stronger. Painting by Rick Guidice courtesy of NASA.
Bernal Sphere low-gravity recreation area at dusk, protected by netting. Gravity becomes lower as you approach the center, and at the very top are the zero-gravity honeymoon suites. Painting by Don Davis courtesy of L5 News and National Space Society.
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Additional illustrations of space settlements: