XPost: sci.physics   
   From: g_d_pusch_remove_underscores@xnet.com   
      
   mha@TheWorld.com (Martha H Adams) writes:   
      
   > I can see the answer to my question depends in part upon if you are in   
   > a spacecraft somewhere in between Earth / Mars orbits, or on some part   
   > or other of the Moon, or on some part or other of Mars.   
   >   
   > My question is, what directions does this radiation come in from;   
      
   Cosmic radiation has no apparent specific discrete sources in space;   
   it appears to arrive with equal intensity from all parts of the sky.   
   It is believed that this is because the galactic magnetic field is   
   sufficiently "tangled" to effectively randomize the direction   
   the cosmic ray particles appear to be coming from, on a scale   
   smaller than the typical distance between sources.   
      
      
   > and if you're on some body, what cyclical variation do you see?   
      
   You would all the time see lots of cosmic rays coming down from the sky,   
   and very few coming up out of the ground if it is thick enough to shield you,   
   with no significant cyclic variation.   
      
      
   > The case for shielding sounds pretty good; but if I were there, I   
   > wouldn't yet know where best to put it.   
      
   You need to put shielding everywhere between you and naked sky.   
      
      
   -- Gordon D. Pusch   
      
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