Black hole in one universe to generate a big bang

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Discussion Overview

The discussion explores the theoretical possibility of black holes in one universe generating big bangs or white holes in another universe, the implications of infinite universes potentially coming into contact, and the nature of time across these universes.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants propose that a black hole in one universe could theoretically create a big bang or white hole in another universe, suggesting a transfer of matter and energy.
  • Others argue that while white holes are conceptually similar to the Big Bang, there is no evidence that black-hole singularities emit matter after collapsing.
  • One participant mentions that if universes are infinite and expanding, it might be possible for them to come into contact, potentially resulting in observable effects in the Cosmic Microwave Background.
  • Another viewpoint suggests that if there are infinite universes, they could all represent different moments in time, with all possible pasts, presents, and futures existing simultaneously.
  • Lee Smolin's hypothesis of cosmic natural selection is referenced, with some skepticism about its viability due to a lack of observable evidence.
  • Concerns are raised about the feasibility of universes existing in different dimensions and the implications for their interactions.
  • Some participants question the testability of these ideas, noting that the existence of a multiverse has not been proven.
  • There is a discussion about the implications of universes existing within their own time-space and the challenges of reconciling this with the concept of universal time.

Areas of Agreement / Disagreement

Participants express a range of views, with no consensus on the viability of the hypotheses presented. Some agree on the theoretical possibilities while others challenge the assumptions and implications, indicating ongoing debate.

Contextual Notes

Limitations include the speculative nature of the claims, the dependence on definitions of universes and dimensions, and the unresolved status of mathematical and observational evidence regarding these theories.

baxtus
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I have a few questions and I was hoping you guys could help

One, would it be theoretically possible for the creation of a black hole in one universe to generate a big bang/white hole creation of another universe, kind of shifting matter and energy from one universe to create another.

Two, if universes are expanding and there are an infinite number of universes, is it possible for universes or dimensions within the universes to come into contact, and what would occur if two universes happened to come into contact.

If there are an infinite number of universes, then isn't it possible, that each universe is one instant in time, and that all moments in time, and all possible moments in time exist at once, basically all possible pasts, presents and futures exist at once.
 
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baxtus said:
I have a few questions and I was hoping you guys could help

Always willing, not always helping though.

One, would it be theoretically possible for the creation of a black hole in one universe to generate a big bang/white hole creation of another universe, kind of shifting matter and energy from one universe to create another.

White-holes are very tricky to achieve in practice, but are a lot like the Big Bang in some ways. Our Universe might have sprung from one. But there's no evidence that black-hole singularities emit matter from them after crushing it to oblivion. Wormholes might be stabilised by the insides of black-holes allowing stuff to pass through, but there's no guarantees it does.

Two, if universes are expanding and there are an infinite number of universes, is it possible for universes or dimensions within the universes to come into contact, and what would occur if two universes happened to come into contact.

It is possible and stuff would spill from one into the other. Such a zone of contact between Universes would probably appear as patch in the Cosmic Microwave Background that's different to the average even temperature.

If there are an infinite number of universes, then isn't it possible, that each universe is one instant in time, and that all moments in time, and all possible moments in time exist at once, basically all possible pasts, presents and futures exist at once.

Yes. If there are an infinite number then some fraction (very small) will all be starting with the same initial conditions and the same physical laws, thus evolving - probably - in parallel, albeit at different starting times (hyper-times?) It's also possible that - if our Universe is infinite - then there are an infinite number of duplicates of our present Earth, all past Earths, all future Earths and all possible Earths. They're also very, very far away. Like double exponential numbers away. Max Tegmark has written extensively on this idea, so look for his papers on the arXiv.org site.
 
thanks, these were some questions I had rolling around in my head, but didn't have the educational background to answer (the social sciences are more my bag)
 
Lee Smolin thinks black holes can form new universes in the manner you suggest. See his cosmic natural selection hypothesis. I doubt this is viable, but, he is the theoretical physicist, not I.

2. I am not sure how bubble universes could come into contact. If they exist in different bubbles, I think the bubbles must exist in different dimensions in some kind of hyperspace. There is no evidence of other universes encroaching into our space in WMAP, as qraal noted.

3. You cannot inject universal time into this equation, they must each 'live' in their own time-space. A universe without an exclusive time-space continuum is unviable, imo.

I think this is a failed hypothesis because there are no apparent observables that allow us to test it. It might be true, but, without observables, it is meaningless in our universe.
 
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Chronos said:
Lee Smolin thinks black holes can form new universes in the manner you suggest. See his cosmic natural selection hypothesis. I doubt this is viable, but, he is the theoretical physicist, not I.

2. I am not sure how bubble universes could come into contact. If they exist in different bubbles, I think the bubbles must exist in different dimensions in some kind of hyperspace. There is no evidence of other universes encroaching into our space in WMAP, as qraal noted.

3. You cannot inject universal time into this equation, they must each 'live' in their own time-space. A universe without an exclusive time-space continuum is unviable, imo.

I think this is a failed hypothesis because there are no apparent observables that allow us to test it. It might be true, but, without observables, it is meaningless in our universe.

Why do you think it is inviable?

Why would they exist within different dimensions, wouldn't all the universes have the same number of dimensions? (what is it now 11, 26?)

But if there are an infinite number of universes, wouldn't each possible state of existence be present at all times in some universe? Therefore wouldn't every possible moment in time also be present, since every moment in time is a possible state?

Isn't all of this stuff untestable anyways? I mean no one has proven that the multiverse exists, as far as I am aware.
 
The unprovable part is my objection. Other universes existing in our spacetime would surely exhibit traces in WMAP, unless they conspire to blend into the CMB of 'our' universe. That seems either highly improbable or irrelevant to me.
 
Well that just may mean we haven't come into contact with another one, not that we cannot
 
baxtus said:
Well that just may mean we haven't come into contact with another one, not that we cannot

Indeed. But it does provide a lower bound of zero for nearby universes. It might remain that way.
 

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