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What is space in contrast to void?

  1. Sep 24, 2013 #1
    Suppose space is expanding in the universe, then there must be void outside the universe. If this theory is true, what would be void? And how would void differ from space?
  2. jcsd
  3. Sep 24, 2013 #2
    I'm aware that space contains cosmic background radiation, dark matter, dark energy and so forth. Would this imply void contains nothing at all? Also, where would void have come from before there was space? Many thanks!
  4. Sep 24, 2013 #3
    It isn't in the sense you mean, but distances are increasing.

    why do you think so? anyway, there is no known 'void'...no such theory nor evidence.

    No one knows what 'existed' before the big bang nor any other kind of bang.
  5. Sep 24, 2013 #4


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    The nomenclature used to describe the expansion of the universe is very misleading. You get all those bangs, expanding balloons, explosions etc.
    A better way of thinking about it, imo, is to imagine the whole universe, maybe even infinite in extent, filling every possible "space" there ever was. Usually people have no problem with doing that. Now imagine that any distance measured in this universe increases by the same percentage every few years.
    That's all there happens. That's the Big Bang. Only without much of a bang.
  6. Sep 27, 2013 #5


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    The universe is effectively infinite. You could travel forever in one direction and never be in the same place twice. Of course, in a universe such as ours there would be no way of knowing if it 'wrapped around' on itself [like an asteroids game] and you had returned to where you 'started'. It would take many, many billions of years, even at light speed, to complete a 'lap' and nothing would be recognizable. And yes, the big bang may have been very big, but, was a lousy excuse for a 'bang'.
  7. Sep 28, 2013 #6
    goldust.....Since such a 'void' is imaginary, you can endow it with all the 'nothingness' you choose.

    But that is not science, just imagination...

    "suppose" IS not a bad way to start new science, but after a new idea, a new supposition, one has to get down to the business of theory detail and experimental verification. Why is it better than current science? What are new predictions? and so forth....
  8. Sep 28, 2013 #7
    What if space-time is finite, but nothing exists without being observed. I think consciousness which does the observing is infinite therefore you have a paradox of the infinite observing the finite which defies logic........or something!
  9. Sep 28, 2013 #8

    D H

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