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Originally Posted by Dujon
Just wait a million years or so until the Andromeda galaxy starts to redden and then tell me I'm wrong - go on, I dare you.
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Just a quibble, I understand the red shift occurs as a result of expansion and 'things' moving further away from us (relative position) over time - however the Andromeda galaxy is actually moving towards us in our local group and is expected to merge with the 'Milky Way' eventually - 3 billion years or so ... So this galaxy is actually blue shifted (opposite of red shift). A million years from now I am doubting you would notice anything, as this is a very short time frame, though at currently estimated 100-140km per second approach speeds we will be a little closer.
