• Question: Is there light from a distant universe that has hit earth since the big bang?

    Asked by 454eadf27 to Deborah, Euan, Maheen, Rob, Stu on 20 Jun 2016.
    • Photo: Euan Allen

      Euan Allen answered on 20 Jun 2016:


      Hi 454eadf27 – great question! I’m going to take that as “Is there light from a distant universe that HASN’T hit earth since the big bang?”

      There is no other universe that we can see (as we live in the only one we know of), but there are some galaxies that have light that hasn’t reached us yet. In fact if we could see all the light from every star in the universe, then the sky would be completely white at night, full of stars. The reason why we have dark parts of the sky is because there are stars that are so far away, that the light from them has not reached us yet.

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