Relativity and Cosmology

    

CMB is Red-Shifted Starlight

Authors: Seamus McCelt

Everyone knows the further back you look through a telescope into the Universe the more things appear red-shifted. If that same process continues the light would be shifted right off the visible spectrum and into the micro-wave. And that is what happened.
Micro-wave (or CMB) radiation is just light from stars that are very far away.
Remember Olbers' paradox? Why is the sky not bright if there is supposedly a star at the end of every point you look? There actually is -- but the light has been shifted.
This is why the CMB appears to be so smooth -- the Universe is filled (for all intents) evenly with stars so you will see just about the same things no matter were you look. A lot of it might be in a different spectrum though.

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[v1] 2016-11-01 17:11:04

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