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Number of Universes

  1. Jun 22, 2003 #1
    Say if there were a large to infinite number of universes, why can't they be sub-universes that make one big universe that accounts for everything. Would it be because the other universes behave differently than the one we observe or perhaps some other reason? I don't see why we would separate them as a different universes when it could just be part of something bigger.

    What are your thoughts on this?
  2. jcsd
  3. Jun 22, 2003 #2
    this is a common misunderstanding.

    one would seperate these universes because there is no reason to have them in the same group. what happens in one universe can have no observable effect in another, therefore they are not compadable and should not be grouped together.
  4. Jun 23, 2003 #3
    If we can't observe it and there's no way we can get there, then that basically means it's not even there in our reality.
  5. Jun 23, 2003 #4
    Exactly, which is why "sub-universe" is a good term, as there can only be one "Universe".

    Also, think of this: Space and time exist within our Universe, do they not? So, if there were such a thing as another "Universe", it would be seperated from us by... ... ... well, nothing. It couldn't be seperated from us at all, could it?
  6. Jun 23, 2003 #5
    That's a good question. I think we need to know more about our universe before we start to go into thinking about other universes. But I just want to hear what all of you think.
  7. Jun 25, 2003 #6
    And yours is a very valid question, giving the fact that one explanation of Schrodinger's theory is the Multiverse theory (which postulates that, every time some event occurs, the other possible events (that could have occured at that time) also occur, but in different Universes). This is a simplification of Multiverse theory, but it suffices to explain why the concept of other Universes (seperated from us by nothing at all (Run through the E.i.N.S.-->
    "Not seperated from us by anything at all)) is still studied by scientists.
  8. Jun 25, 2003 #7
    it's not seperated by us by anything (or nothing), you're right. but to simplify: the light cone of any event in another universe cannot be detectable in our universe. any speculation about other universes must know that there can never be any observable proof to ever support a theory.
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