It's worth noting "Dyson Sphere" is a product of sci-fi literature. Freeman Dyson himself only described an "artificial biosphere" in some paper he published,

It's worth noting "Dyson Sphere" is a product of sci-fi literature. Freeman Dyson himself only described an "artificial biosphere" in some paper he published, sci-fi authors mistook him literally (or were just being creative). He wasn't even describing anything resembling a physical sphere surrounding a star. He speaks to the subject in this excellent interview playlist, link is to the specific Dyson Sphere part: https://www.youtube.com/watch?v=GPB775_BZlw&list=PLVV0r6CmEsFzDA6mtmKQEgWfcIu49J4nN https://www.youtube.com/watch?v=GPB775_BZlw&list=PLVV0r6CmEs...