From: helbig@asclothestro.multivax.de   
      
   In article , Mike   
   Fontenot  writes:   
      
   > Maybe this will help:   
   >   
   > In the classic twin "paradox" with an instantaneous turnaround, the   
   > apparent paradox arises because the traveling twin incorrectly believes   
   > that he can use the time dilation result for his ENTIRE trip.  So he   
   > expects her to be the younger when they are reunited.  When the reunion   
   > occurs, he is surprised and perplexed that she is the older.  The   
   > resolution of this apparent paradox is that during his instantaneous   
   > turnaround, she instantaneously gets much older (according to him, not   
   > her).  So his acceleration is INDISPENSABLE in the resolution of the   
   > apparent paradox.   
      
   There is a simple argument to show that the acceleration is not the   
   cause of the slower aging of the turnaround twin: the magnitude of the   
   effect, i.e. the difference in ages, depends only on the speed travelled   
   and the length of the journey: the longer the journey, and the faster   
   the journey, the greater the difference, even if the acceleration is the   
   same.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)