Andart: Torus–EarthAnother lobe of Anders Sandberg's distributed brain: essays on technology, science and the human condition. Torus–Earth One question at Io9 that came up when they published my Double Earth analysis was "What about a toroidal Earth?" This is by no means a new question, and there has been some lengthy discussions online and earlier modelling. But being a do-it-yourself person I decided to try to ana
ドーナツ地球の重力場
