When Freeman Dyson originally said “Dyson sphere” I believe he had a Dyson swarm in mind, so it strikes me as oddly unfair to Freeman Dyson to treat Dyson “spheres” and “swarms” as disjoint. But “swarms” might be better language, just to avoid the misconception that a “Dyson sphere” is supposed to be a single solid structure.
Third, the mass of Jupiter, if distributed in a spherical shell revolving around the sun at twice the Earth’s distance from it, would have a thickness such that the mass is 200 grams per square centimeter of surface area ( 2 to 3 meters, depending on the density).
A shell of this thickness could be made comfortably habitable, and could contain all the machinery re-quired for exploiting the solar radiation falling onto it from the inside.
When Freeman Dyson originally said “Dyson sphere” I believe he had a Dyson swarm in mind, so it strikes me as oddly unfair to Freeman Dyson to treat Dyson “spheres” and “swarms” as disjoint. But “swarms” might be better language, just to avoid the misconception that a “Dyson sphere” is supposed to be a single solid structure.
The paper says: