Not signed in (Sign In)
      CommentAuthormister hex
    • CommentTimeApr 14th 2010
    I'm reminded of a quote from Steve Purcell's Sam and Max comic :
    "Try to imagine how far the universe extends. Keep thinking about it till you go insane. Do you know that cosmic rays go right through your clothes? Or even these stupid space suits? Sooner or later, we're all going to get something wrong with us. Do you see what I mean?"
    • CommentAuthorFan
    • CommentTimeApr 14th 2010
    > That would mean our universe has bounds, wouldn't it?

    Our universe has many bounds already, hasn't it: the speed of light is one bound/limit, for example, isn't it.

    If we are inside a black hole, then naively I think of that as being *less* limiting than otherwise: because it implies to me that new stuff can come into our universe from outside, instead of this universe being all there is and ever can be from our frame of reference.

    > Isn't a theory about limits of our universe what we are secretely looking for, something to feel less miscroscopic, to soothe our fears? You see what I mean?

    I don't know; most of my personal fears have been earthly, and to do with failing to meet social obligations and expectations, or failing to preserve things that I've valued, or to do with physiological/medical phenomena like illness, pain, sadness, death, etc.: so, all quite (in my mind) a separate realm from astrophysical theory.

    The universe is already so relatively unlimited compared to the lifespan of a human body that the act of considering it is already something which 'takes you out of yourself' and your own personal fears: but that's ditto virtually any other field of knowledge that's bigger than one person: the study of history, for example; or religion, politics, art, engineering, journalism, or even fantasy.
  1.  (8044.23)
    What concerns me about that theory is that if every black hole has a corresponding white hole, where are all the white holes? Is there anywhere in our universe where matter seems to appear from nowhere the way it seems to disappear into nowhere in a black hole? Wouldn't we have heard about this?
    • CommentTimeApr 14th 2010
    @Labryinthine - It might account for this "dark matter" we've heard about. It also might account for the matter we're looking at right now. The way I read it, and from previous theories of the big bang and black holes, one could logically say (I think) that the matter inside a black hole gets compressed, superheated, changed a bit because of that, and then there's the whole "big bang" thing... except slightly different, because the matter it starts with has been altered to be different from the universe it started out in.

    That is, maybe the matter we see already came from another universe all in one go, and that what's left is less of a major stream and more of a slight trickle, if the original black hole even exists after exploding into the big bang. In this way, maybe a black hole isn't a two-way street, so to speak, or even a permanent object once it reaches a certain point. I have no idea, of course, if the math would back up this idea, but I could see it being plausible.
  2.  (8044.25)
    As far as I know white holes just can't exist, if one were to spontaneously pop into existence it would collapse as soon as it encountered any matter (which would be immediately), they're a theoretical construction more than a physical reality. Although I'm guessing for this theory to work, they'd need to be stable.