From: richalivingston@gmail.com   
      
   On Wednesday, July 20, 2022 at 1:39:22 AM UTC-5, Richard D. Saam wrote:   
   > On 7/14/22 1:55 AM, Jonathan Thornburg [remove -color to reply] wrote:   
   ...   
   > > (As Phillip Helbig noted   
   > > in another message in this thread, in our universe 1/CMBR_temperature   
   > > can serve as such a global time coordinate.)   
   > Is there another?   
   ...   
      
   I'm inclined to agree with JT about the 8 hour period in the JPL data.   
   There is too much human and earth related effects to be confident that   
   that is something universal.  And there is absolutely no theoretical   
   basis for such an effect.   
      
   The cosmic background temperature is one good possibility for a   
   universal time, although it would be very difficult to use it to   
   determine the time with any precision useful for humans.  It should be   
   recognized that any such "time" would be a convention that everyone   
   concerned would have to agree to, and as such there are many   
   possibilities.   
      
   A little more practical and  accurate would be a time scale based on the   
   distance between two galaxies as measured in some specified inertial   
   frame.  Another would be based on some master clock in a single   
   particular location in the universe.  With an understanding of special   
   relativity it is possible for everyone everywhere to calculate the time   
   on that clock for the observers location IN THE MASTER CLOCK INERTIAL   
   FRAME.  (Sorry about yelling, but that last part is important!) This   
   would not be a simple calculation for any observer that is accelerating,   
   but in principle can be done.  If the master clock is transmitting time   
   signals by radio, the observer can measure the distance back to the   
   master clock and determine the current time, again having to take into   
   account the observers motion wrt the master clock and the distance.  Of   
   course at great distances when massive objects are near the line of   
   sight, gravitational lensing would complicate this calculation.   
      
   Rich L.   
      
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