Could the Big Bang Have Created a Black Hole?

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Discussion Overview

The discussion centers around the question of whether the Big Bang could have created a black hole, exploring concepts in cosmology and the nature of the early universe. Participants consider the implications of extreme density and mass distribution during the Big Bang, as well as alternative models involving black holes from other universes.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions why the Big Bang did not result in a black hole, given that all matter was initially in a very small space.
  • Another participant argues that the universe did not occur inside another universe and suggests that a black hole would require a more defined separation between gravity and other forces, which may not have existed during the Big Bang.
  • A participant proposes that the early universe was nearly homogeneous in mass distribution, which could have led to gravity canceling out, preventing the formation of a black hole.
  • It is suggested that black holes could potentially exist from regions of slightly higher density in the early universe, although searches for such remnants have not yet been successful.
  • One participant mentions that extremely overdense regions would have been detectable in observations from WMAP, implying a potential avenue for investigation.

Areas of Agreement / Disagreement

Participants express various viewpoints, and there is no consensus on whether the Big Bang could have created a black hole. Multiple competing ideas are presented regarding the conditions of the early universe and the nature of gravity at that time.

Contextual Notes

Participants note the importance of mass distribution and gravitational conditions in the early universe, but the discussion remains open-ended regarding the implications of these factors for black hole formation.

mangog
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I've always wondered about this...if one sun over a certain size is enough (at the end of it's life) to become a black hole, then at the big bang, ALL the matter in the universe was in a very small space...so my question is why wasn't the big bang enough to actually create a black hole itself? Or maybe the big bang could be not a "big bang", but instead matter streaming into a black hole in a different universe and creating ours as it entered...

I have no idea, and I'm no scientist, but I am extremely fascinated by cosmology. I'm very open and eager to read answers to this - many thanks in advance
 
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https://www.physicsforums.com/showthread.php?t=494036

tl;dr, the universe didn't happen inside another universe.Additionally, a black hole would probably require a more defined separation between gravity and the other forces, while most models suggest there was little if any such difference, with many models suggesting that all four forces become a single superforce at extremely high temperatures/energy densities.
 
Last edited:
mangog said:
I've always wondered about this...if one sun over a certain size is enough (at the end of it's life) to become a black hole, then at the big bang, ALL the matter in the universe was in a very small space...so my question is why wasn't the big bang enough to actually create a black hole itself? Or maybe the big bang could be not a "big bang", but instead matter streaming into a black hole in a different universe and creating ours as it entered...

I have no idea, and I'm no scientist, but I am extremely fascinated by cosmology. I'm very open and eager to read answers to this - many thanks in advance

The way I think of it is this. Whether this is right or not I dunno.

At the big bang the universe was packed with extreme density. But it appears that the distribution of the mass was almost homogenous, that is, there was almost exactly as much mass at point A as at point B. So gravity almost cancels out everywhere.

Another way to look at it is to have a black hole you have to have some place with less gravity than there is in the black hole. In the early Universe there was no such thing. There was no empty space whatsoever for a long time.

Now I said gravity almost cancels out. So there could be black holes left over from the old days from regions that had a little bit more density. A search is in progress, no luck as yet.
 
Extremely overdense regions in the very early universe would have stood out like a sore thumb in WMAP.
 

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