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Research suggests Big Bang may have taken place inside a black hole

port.ac.uk

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Re: Research suggests Big Bang may have taken place inside a black hole

#441

Post by potamic »

jarend wrote: post #350

The article is based on a physics paper (arXiv:2505.23877), not management theory or institutional metaphors. What the paper actually proposes is that the Big Bang may have been a gravitational bounce inside a black hole formed in a higher-dimensional parent universe. Quantum degeneracy pressure stops the collapse before a singularity forms. From the outside, it looks like a black hole. From the inside, it evolves as…

They have basically disproved Penrose-Hawking's theories of singularity? Isn't that like a pretty big deal? To people working in this field, what is the reaction to this paper?

Re: Research suggests Big Bang may have taken place inside a black hole

#442

Post by goodcanadian »

edfletcher_t137 wrote: post #70

> The black hole universe also offers a new perspective on our place in the cosmos. In this framework, our entire observable universe lies inside the interior of a black hole formed in some larger “parent” universe. Does it also follow that black holes in our universe contain universes internally, beyond their event horizons?! Seems like it should. Mind-blowing.

Does it also follow that black holes in our universe contain universes internally, beyond their event horizons?!

Not necessarily. It's not clear that any are massive enough to cross the threshold required for the "bounce."

Re: Research suggests Big Bang may have taken place inside a black hole

#444

Post by emigre »

layer8 wrote: post #336
emigre wrote: post #76

Earlier quoted context omitted.

Well, it's just a joke. :) It doesn't necessarily have to make a lot of sense. In any case, I find your comment very interesting. I'm studying quantum computing at the moment, and I've had to read the different interpretations of quantum mechanics, including Everett's many-worlds interpretation. As a non-physicist, I've found the different interpretations fascinating. The many-worlds one, as far as I understood it, s…

The many-worlds theory says that the time-evolution of the (universal) wave function according to the Schrödinger equation is what's real. Different "slices" ("branches") of the wave function correspond to different "worlds". (A "world" is basically defined by what is quantum-entangled together.) The wave function thus decomposes into the different worlds. Collapse theories, in contrast, state that at specific points…

Thank you for the explanation! Your comment has helped me with my Master's degree. The magic of Hacker News!...

Re: Research suggests Big Bang may have taken place inside a black hole

#445

Post by randomtoast »

afarah1 wrote: post #196

Interesting read, but even if we assume the author is correct, and the cosmos formed as a black hole in a larger universe, the question remains, how did this larger universe formed, then? Might just be impossible to know.

Questions like what was before the big bang or what is outside of our universe seem to be quite natural. However, we still don't know if these questions are well defined and have a proper meaning. For instance, a few hundred years ago, one might have asked, what happens if I go to the edge of the (flat) earth? Or one might ask: What is north of the north pole?

Re: Research suggests Big Bang may have taken place inside a black hole

#446

Post by goodcanadian »

avmich wrote: post #234

> But how come Penrose’s theorems forbid out such outcomes? It’s all down to a rule called the quantum exclusion principle, which states that no two identical particles known as fermions can occupy the same quantum state (such as angular momentum, or “spin”). > And we show that this rule prevents the particles in the collapsing matter from being squeezed indefinitely. As a result, the collapse halts and reverses. The…

Then how comes the neutron stars collapse into black holes despite obeying the exclusion principle?

Different exclusion principle. For neutron stars, it is the Pauli exclusion principle (IIRC) which creates neutron degeneracy pressure. Enough mass and gravity can overcome it forming a black hole. The article is talking about quantum exclusion which happens at a much smaller scale. I don't know much about it because that exceeds the limits of my degree.

Re: Research suggests Big Bang may have taken place inside a black hole

#447

Post by mewpmewp2 »

satiric wrote: post #413
mewpmewp2 wrote: post #289

Earlier quoted context omitted.

As an agnostic I agree, but none the less it is a whole, absurd joke to be here without any answers and I demand someone to answer me.

If you agree with the above comment, doesn't that make you an atheist, not agnostic?

I used to think that I was an atheist, but I realized nothing can be proven presently in any way even if I have opinions, so I decided I have to be agnostic.

So e.g. I have hunches that there's no way there is a God that's in any way as religions might think it is, and I do have a hunch that we somehow happened from probably deterministic chain reactions, but it's a hunch, it's hard to call it a belief, or it's hard to think that I believe there is no God. It's more like a hunch or a thought. Because for all I know we could be some Alien's schoolwork project, but I don't think we are.

In any case as a human I feel like I have evolutionary drive to hold someone responsible, so again I demand whoever is behind all of that to give us those answers. But that is my evolutionary drive, not that I think there's actually someone like that. It's the conflict of evolutionary brain vs the logical thoughts brain.

These different parts in the brain can also agree to many different things, which can ultimately make me much more agreeable person, if I decide to pick one of those opinions.

But I can be very disagreeable too, because I think Big Five said it can lead to success?

Re: Research suggests Big Bang may have taken place inside a black hole

#448

Post by Valgrim »

A few years ago a popular idea was that our universe existed as an hologram on the surface of a black hole.

Recently I saw also a theory that black hole might not, in fact, exist as we thought, and may be instead something called 'gravastars', where large stars do not collapse in an infinite point but instead the mass reaches a maximum density and hardness and become sorts of empty bubbles.

Now this. It's not exactly a new idea, I remember reading about black hole cosmology 10 years ago.

Sooo... My uneducated, pop-sci fueled imagination now sees the universe as a mathematical function of a fractal looking like a shell with patterns on it, and those patterns interact or 'fold' in a way where the patterns themselves can be thought of as shells with patterns on them, and each shell creates something that, from the inside, looks like a new dimension of space or time, and what we think of as black holes are the next fold. Does that make sense?

Re: Research suggests Big Bang may have taken place inside a black hole

#449

Post by foobar1962 »

largbae wrote: post #295
mewpmewp2 wrote: post #289

Earlier quoted context omitted.

As an agnostic I agree, but none the less it is a whole, absurd joke to be here without any answers and I demand someone to answer me.

We apologize for the inconvenience.

That's almost a HHGG reference.

Re: Research suggests Big Bang may have taken place inside a black hole

#450

Post by foobar1962 »

satiric wrote: post #413
mewpmewp2 wrote: post #289

Earlier quoted context omitted.

As an agnostic I agree, but none the less it is a whole, absurd joke to be here without any answers and I demand someone to answer me.

If you agree with the above comment, doesn't that make you an atheist, not agnostic?

Atheists are people that don't bleieve there is a God. Agnostics are people who don't know they are atheists. -- Aron Ra
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