From: mcai9ce2@hotmail.com   
      
   On Mon, 29 Dec 2003 23:16:40 GMT, henry@spsystems.net (Henry Spencer)   
   wrote:   
      
   >In article <3fee0641.4808708@news.dsl.pipex.com>,   
   >Christopher  wrote:   
   >>>Bottomline is: you have to absorb it one way or another.   
   >>   
   >>Couldn't the spacecraft have it's own magnetic field?   
   >   
   >To be a useful barrier to incoming particle radiation, the field would   
   >have to be immensely strong or would have to extend over a huge distance   
   >(which means either making it immensely strong at the source, or   
   >generating it with a physically very large structure).  It's possible   
   >in theory but impractically hard in practice, at least for now.   
      
   Any figures as to the required strength it'd have to be?   
      
      
      
   Christopher   
   +++++++++++++++++++++++++   
   "Kites rise highest against   
   the wind - not with it."   
              Winston  Churchill   
      
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