リングワールド には、生命は住んでいますか？
The term "megastructure" refers to artificial structures where one of three dimensions is or larger. The first use of a ring-shaped megastructure in fiction was Larry Niven's novel "Ringworld" (1970). Niven described his design as an intermediate step between Dyson spheres and planets - a ring with a radius of more than and a width of ; these are dimensions far exceeding the ringworlds found in the "Halo" series, which feature radii of The Halos are closer in proportion to a Bishop Ring, an actual proposed space habitat first explained by Forrest Bishop, though the proportions of the Halos do not exactly match up with Bishop's idea or more accurately the bigger Orbital. As seen in the games, Halo installations feature a metallic exterior, with the interior of the ring filled with an atmosphere, water, plant life, and animal life. What appear to be docking ports and windows dot the exterior surface, suggesting that a fraction of the ring structure itself is hollow and used for maintenance, living, and power generation.
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