[NatureNS] Big bang, scattering and red shift

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Dear All, but especially astrophysics experts,

     Is the red shift of light, which would be due to the source moving 
away at great speed, intrinsically unlike the red shift due to Rayleigh 
scattering (which selectively scatters shorter wavelengths; 1/[length to 
the fourth power]) ?

     With ample dust in space, ranging from particles to atoms, one 
would expect the red shift due to scattering to also be a function of 
distance to source.

Dave Webster, Kentville

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