From: helbig@asclothestro.multivax.de   
      
   In article , John   
   Heath  writes:   
      
   > A part of the big bang I do not hear talked about is time dilation   
   > caused by dense mass. As this dense mass starts to spread out it is less   
   > dense therefore less time dilation. Not accelerating away so much as   
   > time running faster. What we observe for distant galaxies is a balancing   
   > act between Doppler effect and the rate time passes. There is no way to   
   > tell which is the greater of the two without a very long ruler.   
      
   The density of a galaxy is, on average, about 1 proton per cubic   
   centimetre.  So even at quite large redshifts---certainly at the   
   redshifts where we can see individual galaxies---the density is quite   
   low, and the gravitational redshift is negligible compared to the   
   cosmological redshift.  The entire observable universe would fit inside   
   a ball with the radius of the asteroid belt and be no denser than a   
   neutron star.  This is an appreciable density, but the cosmological   
   redshift would again be much larger.   
      
   In short, there is no mystery here.  The evidence for the big bang from   
   regions with negligible gravitational redshift is sufficient.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)