>>23418592
>>23420716
Windows on space colonies are not some kind of wistful sci-fi bit. The O'Neil Cylinder is so named because it was designed by an actual researcher. It is intended to be a scientifically feasible construction; uses windows because it is genuinely intended to absorb and reflect sunlight into itself. This is a commonality to several different proposed types of physically feasible space colonies.
https://en.wikipedia.org/wiki/O%27Neill_cylinder
https://en.wikipedia.org/wiki/Bernal_sphere
https://en.wikipedia.org/wiki/Stanford_torus

https://en.wikipedia.org/wiki/The_High_Frontier:_Human_Colonies_in_Space