From: edprochak@gmail.com   
      
   On Saturday, October 29, 2022 at 9:17:57 AM UTC-4, Luigi Fortunati wrote:   
   > If we let all the elevators in the world move freely (unhindered), they   
   > would head towards the center of the Earth where they would all meet.   
   >   
   > If we rested a body anywhere else, it would invariably accelerate   
   > towards the center of the Earth, and only if we rested it in the center   
   > of the Earth would it remain stationary in its place.   
   >   
   > So there is no doubt that the center of the Earth is not the same as   
   > all the other points but it is very special, because it is a center of   
   > gravity (and the other points don't).   
      
   Your question is unclear. What exactly do you mean by   
   "not the same as all the other points"   
      
   If I assume you mean "all the other points" in the universe,   
    then consider:   
   "anywhere else then would include points near Mars for example.   
   A body rested near Mars would accelerate toward the center of Mars, not Earth.   
   Similar results would be obtained for any large body in the universe.   
   So "all other points" is not true for the universe of points.   
      
   If I assume you mean "all the other points" relative to the earth,   
    then consider   
   Lagrange points that exist in the earth moon system. Ideally,   
   if you rest a body at one of these points, then the object   
   "would it remain stationary in its place" and is not accelerated   
   toward the center of the earth.   
      
   So I'm am merely trying to determine what you mean by saying   
   that the center of the Earth is "very special". The phrase just isn't   
   well defined as a physical property.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)