From: ldo@nz.invalid   
      
   On Sun, 18 Jan 2026 08:56:36 -0800, Paul S Person wrote:   
      
   > On Sat, 17 Jan 2026 22:40:20 -0000 (UTC), Lawrence D´Oliveiro   
   >  wrote:   
   >   
   >> The problem is, he still insisted that the planets moved in perfect   
   >> circles around the Sun. So it’s hard to see how the calculations   
   >> could in fact have been any simpler or more accurate.   
   >   
   > Every planet (other than the Earth, of course) had one fewer circle   
   > in Copernicus than in Ptolemy.   
   >   
   > The main circle of the Earth made them unnecessary.   
      
   The fact that calculations still didn’t agree with observations of   
   planetary movements was likely also an obstacle to the adoption of the   
   Copernican theory.   
      
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