An O'Neill cylinder is a space settlement concept proposed by American physicist Gerard K. O'Neill in his 1976 book The High Frontier: Human Colonies in Space. O'Neill proposed the colonization of spa
Artist's depiction of a pair of O'Neill cylinders
Interior view, showing alternating land and window segments
An impression of the interior of an O'Neill cylinder by Don Davis, showing the curvature of the inner surface.
Artist's depiction of the interior of an O'Neill cylinder, illuminated by reflected sunlight
A space settlement is a settlement in outer space, sustaining more extensively habitation facilities in space than a general space station or spacecraft. Possibly including closed ecological systems,
O'Neill cylinder
…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. O'Neill proposed the colonization…
A Stanford torus interior (cutaway view)
"The Brick Moon" – a 1869 serial by Edward Everett Hale – was the first fictional space station or habitat. (Described by other sources as a station or habitat.)