XPost: sci.physics, sci.space.tech   
   From: peter@nospam.calweb.com   
      
   George Kinley wrote:   
   > Hi,   
   > if there is no Atmosphere, where do rockets that go in Space get thrust from   
   >   
   >   
   Goddard was pestered with the same question.  The answer is simple, by   
   pushing against the propellent being thrown out through the engine.   
      
   Consider a kid on a very low drag sled and a pile on beanbags.  By   
   throwing the beanbags in one direction, he can build up speed in the   
   other direction.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)