From: smithm@SPAMBLOCKnetapps.com.au.retro.com   
      
   On 29 Dec 2004 23:58:36 -0800   
   bradley_fagan6@msn.com wrote:   
      
   > A near earth spent comet measer for size.   
      
   There are very few of these. Most comets are in highly eccentric orbits.   
      
   > Make bag,   
   > send bag out to comet. Fly bag around comet, seal bag spin and tumble   
   > bag to mach comet . Cargo net grabes comet.   
      
   > Micro wave tranmiter flying near comet heats comet   
      
   This is _very_ expensive to do with microwaves, but quite easy with cheap sun   
   light. Perhaps you should think in terms of using a solar sail to match orbits   
   with the comet, then using the solar sail as a solar concentrator to heat it   
   up.   
      
   This is to place fuel closer to us to mine.   
      
   OK, yes, comets can be used as a source of water for fuel, reaction mass, etc.   
   And mining it from comets is something which we will probably do in the future.   
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   Michael Smith   
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