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  1. #1
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    Default Is it possible that our universe was a supermassive black hole?



    I am reading a book about General Relativity and how mass "dents" the space-time fabric. My understanding is that black holes are just lots of mass crushed to a extremely small size because of gravity, thus making a very "deep" dent. So, as i'm thinking back to the start of the universe, i realized that that is basically what out universe was before the big bang, mass crushed to a very small size. So, it is possible that our universe was a super massive black hole that exploded because it reached maybe a theoretical limit of mass, or am i completely missing something?
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    SInce we know nothingif what was "before" the big bang, yes it is "possible". Bit there is as yet no evidence to support it.

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  5. #3
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    There is also no evidence (or theory) that supports the idea that there may be an upper limit to a black hole's mass. If anything, everything points at larger black holes being more stable (in today's conditions) than smaller ones.

    On the other hand, nobody really knows what happens within a singularity like the "centre" of a black hole (if Hawking/Penrose are right and there is indeed a singularity inside an event horizon - the maths is way beyond me), so we exit science and enter science fiction (or speculation).

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    Default

    Two quotes:

    "Cosmologists are often in error but seldom in doubt." - Lev Landau
    "I am certain that it is time to retire Landau's quote." - Michael Turner

    Is it possible that our universe was a supermassive black hole?
    It is possible, but I am still doubt

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  9. #5
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    Default

    The mega black hole is kind of at the core of my current belief, assuming I believe in the big bang (which I'm not totally 100% on).

    It seems that everything in the natural world come in regular tiers of magnitude - atoms, solar systems, galaxies; black-holes, galactic-core-black-holes, ... If the universe was ever super-condensed, then a mega black hole is, to me, the logical extension of that.

    As others have said, though, there is no evidence (currently) to support that - just a feeling I have.

    I'm kind of waiting for someone to find evidence of a black-hole somewhere going through a mass-ejection of the matter it has sucked up. That would pretty much seal the deal on the big bang for me.
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  13. #7
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    Default

    Thanks for all your replies.

    @Gunmonkey
    Not quite sure on the big bang myself, but if it did happen that way, like you, a black hole would explain it very well for me.
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    I'm glad this question has been asked because being an insomniac I lay in bed with my head spinning with things like this. Now I will not claim to know anything about astrophysics but my theory is that maybe the universe is a lot and I mean a lot older than we think.

    My Theory based on the Big Bang and the Big Crunch:
    The universe starts out with all matter crushed into a mega sized black hole, then at some point the mass becomes so great that it just cant compress anymore but with that amount of energy a huge explosion happens. (This is my view of the Big Bang). fast forward a few billion years to the point where the universe can no longer expand and the Big Crunch (supposing the theory is correct) happens. Fast forward another few billion years and all matter is sucked back towards this supersized black hole. The black hole then compresses and crushes everything in sight until once again it explodes and the whole cycle starts again.

    Like I said before, I am not in any way, shape or form, competent in the sciences need to work these things out if it is even possible to, but to me at least it does seem possible.

    Thanks for listening and if this is ever proven please remember you read it here first. I feel a Noble Prize coming my way.

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    Hi Nathe, that concept is an old one. I heard it first about 55 years ago except we weren't talking about black holes back then. The observations since then have given us a better idea of the expansion rate of the universe and it doesn't seem to fit.

    But there isn't a solid theory to explain what we have observed. We still have a lot of work to do.

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    There goes my fifeteen minutes of fame...and my million quid...looks like I'll have to tell the European Space Agency I cant buy that rocket off them after all.

    But on a more serious note, 55 years ago, that would be before black holes were "discovered". I think thats correct. If so then what was the theory back then, as in where was everything thought of to go.

    Another question I have is, if two black holes "collide"what happens. Does the black hole increase in mass but with still only one black hole. Or does it become a black hole within a black hole. If so, my understanding is that from the outside time appears to stop within a black hole, so if a black hole is inside another black hole what happens to time...reverse perhaps?

    Sorry if this doesn't make sense, the questions are in my head but trying to put them down on paper is a nightmare for me without writing a thousand page essay.

    P.S. sorry if it looks like I'm stealing the thread. I'm not trying to and maybe my thoughts are better put to a new thread.

    Nathe

 

 
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