From: ram@zedat.fu-berlin.de   
      
   Tom Roberts  writes:   
   >Also see my earlier post in this thread -- in the solar system the   
   >approximation holds, and even though gravity "propagates" with speed   
   >c, the "gravitational force" essentially extrapolates objects'   
   >positions to "now" so it is essentially as if gravity "propagated   
   >instantaneously".   
      
     It would be too strange if this would open any door to   
     transfer information instantaneously (faster than light).   
     So something must be in power to avoid this. It could be   
     that "nothing surprising" can happen in the world with   
     regard to the gravity field in the sense that the extrapolation   
     you mention must coincide with the real behavior.   
      
     If one could "surprisingly" create a large amount of energy   
     at a place, we would not expect this new information to   
     be able to escape faster than light. This might indicate   
     that such an event (a "surprising" creation of energy at a   
     place) is not possible.   
      
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