Inside the habitat

[stevebowers]

If a multi-layered, densely populated habitat also grew a significant fraction of its food, this would require a very large energy through-put; a lot of solar power collection, and large radiators to eject the waste heat. It could be done, but the result would look a bit different to the basic cylinders we've been depicting so far.

I note that the Stanford Torus (designed by a group that was independent of O'Neill's studies) did include a large light-collection system as well as a prominent radiator pointing directly away from the Sun.