From: relativity@paulba.no   
      
   Den 20.02.2026 11:55, skrev Mikko:   
   > On 20/02/2026 11:55, Paul B. Andersen wrote:   
   >> 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   
   >   
   > The measurement described in the 1887 article was not sesitive enough   
   > that the difference between the ECI frame and the surface frame would   
   > matter.   
   >   
      
   Right.   
   That's why Michelson ignored the speed of the lab in the ECI-frame.   
   What he tried to measure was the speed of the ether in the ECI-frame.   
      
   See my response to J.J.Lodder.   
      
   --   
   Paul   
      
   https://paulba.no/   
      
   --- SoupGate-Win32 v1.05   
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