Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Universe Was Born in a Black Hole?

  1. Dec 13, 2006 #1
    How credible is the theory that the Universe Was Born in a Black Hole?
    What proportion of physicists support this view?

    Is it predicted by any fundalmental theories?

    There is evidence to suggest that the size of the universe lies in the range of the Schwarzschild radius for a black hole.
  2. jcsd
  3. Dec 13, 2006 #2
    I have heard a theory that the Universe was born in a little piece of 'void' ...
    All theories are equally valuable until one of them is proved ;)

    But that's interesting... If the Universe was born in a black hole ... Where did this hole came from?
  4. Dec 13, 2006 #3
    My speculation.
    IMO our universe IS a (black)hole. Earlier iN PF however this item was raised and links to articles were given with arguments that it could not be a BH. IMO our observable universe is part of its changing kernel and was phase-transformed (and not created) 14 billion years ago, i.e always existing while changing. Our hole, IMO, lives orders of magnitude longer than those 14 billion years and will continue to live orders of magnitude longer before it will be evaporated in the surrounding energysoup.THE universe (name it Googolverse, infinity verse, multiverse or whateververse) IMO contains an infinite number of concentrationholes all within a soup of energy.
    I know this idea is (too?) speculative but IMO more realistic than the idea of creation out of nothing.
    Maybe LQG theory of M. Bojowald can serve an entrance to further thinking.
    Also among stringtheorists there are individuals who don't accept our BB as a beginning and there are also individuals amongst them finding a multiverse a reasonable boundary/environment for our universe. But personally I considder stringtheory more as a mathemathecal archive box than as a physical model which agrees reality (who am I to dare to say this?).
  5. Dec 13, 2006 #4
    Now that's a brave theory. However, it might be interesting. So in your opinion where this hole we live in is located? In another universe?

    Should we consider then any other black holes as other Universes?

    I have read somewhere that new univereses 'appear', 'happen'. What's your attitude for this?

    LQG theory of M. Bojowald <- what is that? Can you serve me a link or a brief explanation?
  6. Dec 13, 2006 #5
    I think this theory is negated by the simple fact that the metric for BHs and the present expanding universe are not the same. I don't think that BHs have a metric that incorporates expansion whereas our observable universe does.
  7. Dec 13, 2006 #6


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    There are a lot of threads on the relation between the universe and a black hole. This particular issue is discussed in detail in this thread:

    Last edited by a moderator: Apr 22, 2017
  8. Jan 5, 2007 #7
    It took some time before I could give you my reaction but here it is.

    - In order not to be misunderstood, I make a distinction between observable universe (OU), Our Blackhole Universe (OBU), and The Infinite Universe (TIU)

    - As we already know, inside OU there are black-holes. Their average densities are orders of magnitude higher then the average density of OU which belongs IMO to the kernel of OBU which is indeed located in OBU. The heavier blackholes are the less dense they are. I question myself should there be a minimum to density, just as there is a maximum (Planck-density) for the smallest possible blackhole?
    - OBU, I suppose, is located in TIU (maybe parallel in a multiverse or even nested in a gigaverse or so?)
    - IMO the idea of other blackhole-universes can be a consequense of relative thinking.
    - Blackholes are generated and are due to evaporation, so I don't exclude them.
    - Just use the search option by typing Bojowald in. You also find Rovelli and Asthekar.
    Marcus in "Intuitive content of Loop Gravity" gives a lot of information.
    He is a specialist, not me.
  9. Jan 5, 2007 #8


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    There is far too much speculation in this thread. Unsupported personal theories are not welcome on PF. Thread closed.

    - Warren
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook