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It’s oneil cylinders without the spun mass of the radiation shielding. Or wasted propellant during spin up—no propellant at all is used.
I’ve reached the same conclusion—it’s likely going to have to be asteroids, not planets.
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It’s oneil cylinders without the spun mass of the radiation shielding. Or wasted propellant during spin up—no propellant at all is used.
I’ve reached the same conclusion—it’s likely going to have to be asteroids, not planets.