XPost: comp.theory.cell-automata   
   From: max@alcyone.com   
      
   Hephaestus wrote:   
      
   > G M_sun / r^2 = G M_earth / r_earth^2   
   >   
   > working in units where M_earth = r_earth = 1 gives us:   
   >   
   > r = sqrt(M_sun)   
   >   
   > M_sun ~ 330,000 M_earth, so r ~ 600 r_earth.   
   > But r_sun ~ 110 r_earth, so the sphere is really really close to the   
   > sun.   
   >   
   > It will be hot.   
      
   It could conceivably work for low-mass red dwarfs:   
      
   http://www.alcyone.com/max/writing/essays/outside-dyson-shells.html   
      
   --   
    __ Erik Max Francis && max@alcyone.com && http://www.alcyone.com/max/   
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