From: jdnicoll@panix.com   
      
   In article <19ydnRr8qM3cHHfenZ2dnUVZ_sudnZ2d@giganews.com>,   
   David McMillan   wrote:   
   >James Nicoll wrote:   
   >   
   >>>What other energy is there in space? After sunlight/starlight, there's   
   >>>no energy of any significance (unless you want to play games with   
   >>>trading motion of a spacecraft for power in a planetary magnetic field,   
   >>>which is just another way of getting energy out of the spaceship's fuel   
   >>>tank.)   
   >>>   
   >>   
   >> 	Don't forget gravity, which can be exploited with fly bys and   
   >> Oberth manuevers.   
   >   
   >	Bbbbut!  That energy isn't free!  You STEAL IT from the PLANETS!   
   >Why, the Voyager slingshots past Jupiter ROBBED that planet of nearly   
   >1 bajillionth of its orbital speed!  If we keep doing this, we will   
   >PERMANENTLY ALTER the natural arrangement of the ENTIRE SOLAR   
   >SYSTEM!!!!!!!!!   
   >   
   >	(sorry.  I just had to channel my inner lunatic-fringe envirowhacko.   
   >  I'll try not to let it happen again.)  :)   
   >   
   	You jest but in fact, I have seen at least one person object   
   to our reckless alteration of planetary orbits. Really.   
      
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