From: del@branta.demon.co.uk   
      
   On Sat, 4 Jun 2005, in sci.space.science,   
   Corona  said:   
      
   >"Paul E. Black"  wrote in message   
   >> More fundamentally what does it mean that the universe is expanding?   
   >> It could mean that new space is coming into existence at "the edges",   
   >> but astronomers don't find any evidence of that.  Rather, it appears   
   >> that space itself is stretching.  For instance, (ignoring gravity and   
   >> inertial motion) each thing will be 10% farther from each other thing   
   >> in X billion years.   
   >>   
   >> Imagine the surface of a balloon being blown up.  Every point is   
   >> getting farther from every other point.  But there is no center (or   
   >> edges).   
   >   
   >If space is stretching wouldn't that mean that the space between particles   
   >is also stretching...   
      
   It would mean that, but the particles respond by moving closer to each   
   other.  So it's only out between the galaxies that you see the actual   
   cumulative effect of the expansion.   
      
   --   
   Del Cotter   
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