From: relativity@paulba.no   
      
   Den 19.02.2026 20:00, skrev amirjf nin:   
   > Has anyone tried Michelson-Morley-type experiments with the ECI in mind?   
      
   If you by "the ECI" mean "the non-rotating frame of reference   
   where the centre of the Earth is stationary", this was very much   
   in Michelson's mind.   
   He tried to measure the speed of the ether in said frame.   
      
   In Michelson's words:"the motion of the earth through the ether".   
      
   https://paulba.no/paper/Michelson_1887.pdf   
      
   --   
   Paul   
      
   https://paulba.no/   
      
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