@holvek: To build an O’Neill cylinder, the station should be placed at the gravitationally stable L4 or L5 Lagrange point between Earth and the Moon. To avoid the massive costs of launching materials from Earth, metals, silicon, and soil are mined on the Moon or asteroids and delivered into orbit using an electromagnetic mass driver. The structure itself consists of two massive cylinders, each 8 km in diameter and 32 km long, connected by a central axis and rotating in opposite directions to cancel out gyroscopic effects. Each cylinder's hull is divided into six longitudinal strips where three pressurized habitable valleys made of steel or aluminum alternate with three reinforced glass windows, while the exterior is covered with lunar regolith for radiation shielding. To generate artificial Earth-like gravity (1g), the station is spun at roughly 40 rotations per hour, pressing everything against the inner walls. An oxygen-nitrogen atmosphere is pumped inside to support forests and cities, while three giant external mirrors adjust the angle of sunlight to simulate day-night cycles. #facts #sciencetok #interstellar #astro

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Sunday 15 November 2026 13:20:12 GMT