From: tjroberts137@sbcglobal.net   
      
   On 4/11/22 3:00 AM, Mike Fontenot wrote:   
   > if I'm mutually stationary wrt the array of clocks that I have   
   > previously described, which provides a "NOW" for me extending   
   > throughout space, [...]   
      
   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, so the spaceships carrying those clocks must be clairvoyant,   
   because they are separated from you by spacelike intervals. Moreover,   
   such clocks located sufficiently far away from you will require an   
   unphysical acceleration and/or velocity to remain on station; you   
   cannot cover the universe with them, only a region "close" to you (how   
   close depends on the details of your maneuvering).   
      
   	[I suppose you could plan out your trip in exquisite   
   	 detail, and the spaceships carrying the other clocks   
   	 could pre-compute their accelerations to match. But   
   	 anyone who has ever driven a car knows how poorly   
   	 such plans are followed.]   
      
   If you carefully keep track of your acceleration, velocity, and position   
   relative to some coordinates, then you can calculate what "now" means to   
   you at a distant location, as you maneuver. As I have pointed out many   
   times before, that in general gives nonsensical and unphysical results.   
      
   If you "believe" that your wife back home can grow younger due to your   
   maneuvering, then you will believe anything, which is useless, and is   
   certainly not physics.   
      
   Tom Roberts   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)