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We all know that the universe is expanding at an accelerated rate and it might appear much like a soap bubble. That is where the phrase dark energy whose essence is unknown and which is thought to have caused this comes from. But that is not what this question is really about. If we could stand at the very edge of the expanding universe...

  1. What would we see just outside of it? Pure blackness or other expanding bubbles of multiverses?
  2. How about at the very edge? Would there be a membrane of some kind?
  3. What about at the inside of the edge? Of course this last question is easy to tackle because we would just see our own universe.
Jules Manson
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    possible duplicate of Did the Big Bang happen at a point? – ACuriousMind Feb 18 '15 at 03:20
  • @ACuriousMind Please do not abuse your privileges. This post is not a duplicate of the other. Re-read both posts again. Mine goes into depth and asks very different questions. – Jules Manson Feb 18 '15 at 03:24
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    Read the answer to the question I linked. There is no edge, there is nothing the universe expands into, and the term "outside" is meaningless. You question is based exactly on the same misconception as the idea that the Big Bang happened at a point. – ACuriousMind Feb 18 '15 at 03:28
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    Edge of the universe? https://www.cfa.harvard.edu/seuforum/faq.htm#s1 – Alfred Centauri Feb 18 '15 at 03:30
  • The answers may be the same but they are two entirely different questions asked. Again I say re-read the posted questions to each post. They are not the same. – Jules Manson Feb 18 '15 at 03:31
  • @ACuriousMind

    By the way I do agree that the universe did not begin from a single point in space because space did not yet exist for our universe but since its expansion it does appear to be moving away from a point somewhere inside our universe.

    Secondly I am very much aware the no one knows what lies beyond our expanding universe (what is it expanding into) but I posted this question to see what others thought may be possible. In other words this question is as much a philosophical one as it is scientific.

    Please remove the duplicate.

     – Jules Manson Feb 18 '15 at 03:41
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    @ACuriousMind Sorry about that. I thought you duped it but you only commented on it. – Jules Manson Feb 18 '15 at 03:44

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What would we see just outside of it? Pure blackness or other expanding bubbles of multiverses?

Outside our particle horizon we assume that everything is more or less the same like where we are, at least if the assumption of homogenity and isotropy holds. If we live in a multiverse there might also be other laws of nature beyond or horizon, but there is no way to really test this. Anyway, more speculations on this can be found here and here.

How about at the very edge?

The universe has no edges. If it is finitely curved you always get back to where you started from when you move in a straight line (except if superluminal expansion confines you to a horizon smaller than the cirumference of you dimension).

Yukterez
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