Centrifugal force in a spinning ring is technically an artificial gravity substitute, you're right about that. And this piece is sci-fi, but it's mostly sci-fi

Centrifugal force in a spinning ring is technically an artificial gravity substitute, you're right about that. And this piece is sci-fi, but it's mostly sci-fi engineering, not sci-fi physics. To suggest that ""We don't have it until the future" is wrong. Centrifuges are a thing. Building one in space would be only an engineering challenge. The "how it works" part is well-understood science. There are detailed plans for smaller rings in space, building one is just a matter of NASA budgets and priorities (they chose more robots to outer planets instead, over twirling canned humans in LEO, and there are upsides to that). It's classical physics, even: The old rivals of that, Isaac Newton and Gottfried Wilhelm Leibniz literally did the math in the 1600s on how centrifugal force works: https://en.wikipedia.org/wiki/History_of_centrifugal_and_centripetal_forces https://en.wikipedia.org/wiki/History_of_centrifugal_and_cen...