Since we can essentially always see Cosmic Microwave Background radiation, does that mean that the Big Bang and the expansion of space are still generating light/radiation? If not why are we still able to see it? Wouldn’t the photons have passed us at this point?
In: Physics
Light takes time to travel. This means that light from a very long distance away could take quite a while to reach us.
The CMB radiation we see today has been traveling since the dawn of the universe. Of course the photons from nearby have passed us, but those from very far away have not.
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