From: nospam@de-ster.demon.nl   
      
   Luigi Fortunati  wrote:   
      
   > In accelerated reference frames, the clocks do not stay synchronized   
   > with each other.   
   >   
   > Yet on Earth, which is an accelerated reference frame, all the clocks   
   > that are at the same altitude remain perfectly synchronized with each   
   > other wherever they are, why?   
      
   No. They don't.   
   It is just that the gravitational effects of the sun can be ignored.   
   (with the available precision)   
   Remember that the radius of the Earth   
   is very small on the scale of the AU.   
      
   Jan   
      
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