Right. They justify this by radiation and impacts, but without giving any numbers. Those were certainly considered back in the 70s. https://en.wikipedia.org/wik

Right. They justify this by radiation and impacts, but without giving any numbers. Those were certainly considered back in the 70s. https://en.wikipedia.org/wiki/O%27Neill_cylinder#Atmosphere_and_radiation https://en.wikipedia.org/wiki/O%27Neill_cylinder#Atmosphere_...