From: mlfasf@comcast.net   
      
   On 4/11/22 1:19 PM, Tom Roberts wrote:   
   >   
   > If you are an astronaut in a spaceship that can travel at an appreciable   
   > fraction of c, and which you maneuver, then such an array of clocks is   
   > impossible -- each such clock must vary its acceleration in concert with   
   > yours [...]   
      
   No, that's not correct.  According to the accelerating observer (the   
   AO), whose conclusions we seek, he and each of his "helper friends"   
   (HF's) undergo EXACTLY the same (constant) acceleration, as recorded on   
   their accelerometers.  This is clear by looking at the equivalent   
   scenario in the case of a constant gravitational field with no   
   accelerations (via the equivalence principle) ... all of those people   
   are motionless, unaccelerated, and mutually stationary.  And according   
   to them, the distance between each of them is also constant.  In the   
   acceleration scenario (in the infinite flat spacetime of special   
   relativity), perpetually-inertial observers, who are initially   
   stationary with respect to the AO and the HF's, WILL conclude that the   
   accelerations of the AO and the various HF's, and their distances apart,   
   DO vary with time.  But it is not their conclusions that I am interested in.   
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)