XPost: sci.space.moderated, sci.space.shuttle   
   From: dietz@dls.net   
      
   Jon Berndt wrote:   
      
   > Nowhere is mention made that this particle beam causes any "equal and   
   > opposite" action at the particle-beam source. If this near-Earth station is   
   > blasting a particle beam into space that causes a spaceship to accelerate   
   > (momentum transfer) to "tens of thousands" of mph ... what is the source   
   > doing to maintain position or orbital velocity? Am I missing something?   
      
   If the transmitter is in orbit around Earth, the net effect would be   
   to displace the orbit slightly, so that the momentum is transfered   
   to the planet.   
      
     Paul   
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)