• Question: What theories are there for what is at the edge of space?

    Asked by anon-256854 to Martin on 13 Jun 2020.
    • Photo: Martin Coath

      Martin Coath answered on 13 Jun 2020:

      Interesting question. The ‘edge of space’ as far as we are concerned means: everything that is so far away from us that the universe isn’t old enough for the light to have reached us yet. (This is what astronomers call ‘the observable universe’.)

      We have no idea what is beyond this ‘edge’ (which is about 45 billion light years away) and we never will. But there is likely to be a lot more universe beyond it from which no information will ever be gathered. 😀

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