O'Neill cylinder

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Notion

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Science and technology

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What Wikipedia says

An O'Neill cylinder (also called an O'Neill colony, or Island Three) is a space settlement concept proposed by American physicist Gerard K. O'Neill in his 1976 book The High Frontier: Human Colonies in Space.

Excerpt from the Wikipedia article “O'Neill cylinder”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: NASA/Rick Guidice, Public domain, via Wikimedia Commons.