From: henry@spsystems.net   
      
   In article ,   
   George Kinley   wrote:   
   >...Considering only the galaxy  rotating factor , also sun  and all   
   >other stars  are also rotating with galaxy.   
   >So are they all moving in same direction at same speed, is it possible that   
   >sun is moving away from us   
      
   No.  The Earth's motion around the Sun is known very accurately, and our   
   distance from the Sun is quite stable.  (It varies slightly with the   
   season, because Earth's orbit is not quite circular, but both the pattern   
   of variation and the average distance are stable.)   
      
   The Sun overwhelmingly dominates Earth's motion.  Speaking loosely, Earth   
   orbits the center of the galaxy only because the Sun does so.   
   --   
   MOST launched 30 June; science observations running     |   Henry Spencer   
   since Oct; first surprises seen; papers pending.        | henry@spsystems.net   
      
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