From: 1@2.com   
      
   "Mike Speegle"  wrote in message   
   news:bfmc27$gdaj7$1@ID-130573.news.uni-berlin.de...   
   In news:jjustwwondering  typed:   
   > "Mike Speegle"  wrote in message   
   > news:...   
   > > In news:jjustwwondering  typed:   
      
   > > > A comet tail is a solar sail...   
   > >   
   > >     Actually a wake as the tail has no effect on the comet head.   
   >   
   > Nothing like a wake: the tail does not spread in the direction   
   > opposite to the comet's movement - but in the direction opposite   
   > to the sun - i.e., the direction in which it is pushed by   
   > solar radiation.   
      
       That was the context is was using wake, "downstream" of the solar   
   pressure and not related to the path of the comet head.   
      
   > The comet head is not significantly affected, but that   
   > is beside the point: comparing the tail to a sail   
   > does not entail comparing the head to a spacecraft.   
      
       Okay, then I misunderstood your short statement and what you meant.   
   -)   
   --   
   Mike   
      
      
   Maybe a better analogy is a ribbon blowing in the wind, independent on the   
   motion of the head....   
      
   --   
   (All advice is checked, re-checked and verified to be questionable....)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)