From: helbig@asclothestro.multivax.de   
      
   In article , Luigi Fortunati   
    writes:   
      
   > 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).   
   >   
   > Also for General Relativity, is the center of the Earth different from   
   > all other points?   
      
   Not different from all other points, but different from all other points   
   on Earth because, as you mentioned, it is the center of gravity.  But   
   there is nothing special about the location per se, as one can change   
   the center of gravity by, say, digging a hole and piling the dirt into a   
   hill nearby.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)