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

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

#591

Post by yibg »

hshshshshsh wrote: post #457
yibg wrote: post #389

Earlier quoted context omitted.

How about just having one God vs many? If there is a single omnipotent being, why do various cultures have multiple gods? And why do different cultures’ gods tell them different things?

Fair question. So my understanding is God is consciousness. It's omnipotent, all knowing and eternal. It's the only thing which is constant in your life and it sees everything you do. Now, you cannot worship consciousness as humans because it's invisible and you can never imagine it. You need a version of consciousness that you can see as well as you can relate to. So cultures invent localized version of God which pe…

I’m sorry but that’s a lot of words to provide no additional clarity. God is consciousness. So if there are no conscious beings in the universe there is no god? Or is this just renaming something that already has a meaning into god?

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

#592

Post by raxxorraxor »

oreilles wrote: post #479
raxxorraxor wrote: post #462

Earlier quoted context omitted.

Ironically that was basically the first thought many had when it was clear we cannot explain what happens in the edge case of a singularity. It was always "perhaps another unsiverse or a way into a parallel one". It still leaves a lot of questions though, especially if you try to marry quantum mechanics to these makroscopic models. Where did the initial black hole come from and should a corresponsing anti matter blac…

Well that's an indsight bias if I've seen one. This is the first time I ever read that the "bottom" of a black hole could be a entirely new universe. If there ever "always was" a common hypothesis, it was the wormhole.

There wasn't much substance to it back then, but the idea certainly had been circulated in context of singularities where physics break down. So hypothesis is probably an exaggeration.

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

#593

Post by acjacobson »

baw-bag wrote: post #267
arto wrote: post #183

Earlier quoted context omitted.

So many books, so little time...

There needs to be some kind of hackernews library or goodread. I have enjoyed many books (and some no so much) but always on the look out for books.

You'd like this then: https://hackernewsbooks.com

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

#594

Post by blamestross »

corry wrote: post #575
PaulHoule wrote: post #525

Earlier quoted context omitted.

I don't see this idea as very new. There are many models of black holes, such as the Schwarzchild solution, that have an area of "asymptotically flat spacetime" which is, from the viewpoint of our universe, part of the black hole. That something happens around the singularity that creates this new universe doesn't sound that crazy. If our universe is a child of another universe and that is a child of another universe…

Do you find the idea of an infinite regress -- "our universe is a child of another universe and that is a child of another universe and so forth" -- holds much explanatory power for you? To me it's prima facie a hollow explanation. I get that some models, like eternal inflation or certain cyclic cosmologies, entertain the idea of an infinite past or blur the standard arrow of time... but how does pushing the origin q…

The problem is that:

- We have a parent universe we will never be able to observe.

could be a true statement.

The "infinite sequence" part is just a likely implication, it isn't necessarily true. We would need information we can't access to find out.

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

#595

Post by blamestross »

godelski wrote: post #588
mcswell wrote: post #533

Earlier quoted context omitted.

>> The black hole in the parent universe must be much much bigger than >> anything we see in ours >> Yes and no. You're not thinking about contraction. With relativity >> we can fit a 100ft ladder inside a 10ft barn. I believe the OP was talking about mass, not linear dimension. (And if he wasn't, I am.) Unless somehow mass inside a black hole is not constant? (ignoring accretion)

Relativity applies to mass too. Accelerate and you become heavier. Remember, mathematically, a blackhole is mass in an infinitely small point. You are dividing by 0. I don't know the answer, but if someone is saying that from the outside the apparent mass is different than from the inside, that doesn't set off any alarm bells. We literally are talking about Dr Who style "it's bigger on the inside". Even the ladder ex…

*aparent mass goes up

Things don't get more mass, they just take more energy to accelerate which looks a lot like more mass.

It doesn't imply for example, a high speed mass would cause more gravitational attraction than a slow one.

If that was the case, a black hole would be even worse as it accelerates matter towards itself and it gains "bonus mass"

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

#596

Post by blamestross »

2OEH8eoCRo0 wrote: post #528
godelski wrote: post #522

Earlier quoted context omitted.

> requires a parent universe Not exactly . A universe can expand, slow down, then collapse. In this case, bouncing back out. Does that repeat forever? Does it lose energy in the bounce? If so, to where and how? > The black hole in the parent universe must be much much bigger than anything we see in ours Yes and no. You're not thinking about contraction. With relativity we can fit a 100ft ladder inside a 10ft barn. Mo…

Where does the information of the previous universe before the bounce go? Is it destroyed?

Cosmic Background Radiation distribution could be that information. The distribution of mass hitting the event horizon then bouncing

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

#597

Post by michaelmrose »

graemep wrote: post #411
n2d4 wrote: post #71

Earlier quoted context omitted.

Yea, and it was a great read too. I wish more researchers would publish blog posts alongside their technical whitepapers, although I acknowledge that not everyone involved in science has or wishes to acquire the skills needed to write blog-form content. (I'd also be worried about a world where researchers are evaluated based on the virality of their blog posts, vs. how impactful their work was.)

I think the benefits greatly outweigh any dangers. I far prefer to read something like this than something written up by a journalist. > I acknowledge that not everyone involved in science has or wishes to acquire the skills needed to write blog-form content. They should. If your research is publicly funded you should make it as available to be public as possible. Academics should be able to communicate, and I very m…

> They should. If your research is publicly funded you should make it as available to be public as possible.

The public can access it by becoming subject matter experts. If the government or the public to which it is responsible requires a popsci treatment they can pay other people with this skill set.

I don't doubt having this skill set is useful I merely disclaim any sort of obligation on the part of the scientific staff to possess or exercise such a skill.

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

#598

Post by michaelmrose »

leiroigh wrote: post #476
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…

>in a higher-dimensional parent universe That's incorrect: The parent universe is not higher-dimensional, it's the same good old 3+1 as our universe. What they propose is: Let's take our good old GR, and start with a (large, dilute) compactly supported spherically collapsing collapsing cloud of matter. During that, you get an event horizon; afterwards, this looks like a normal black hole outside, and you never see th…

Why does this black hole bounce whilst others from the limited info we possess appear to be stable regardless of lack of singularity

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

#599

Post by zargon »

tiltowait wrote: post #559
teaearlgraycold wrote: post #543

Earlier quoted context omitted.

No randomness when taking everything into account. I’m not an expert but I still hold out hope that if you know more about the universe than humanity does everything will be known to be deterministic. Also implies that all singularities of the same mass are identical. I think this should be less bold of a statement. Let’s speculate that the more mass in the singularity would correspond to higher iterations in somethi…

While I doubt you’re unique in this, I think this is the first time I’ve seen someone say they hope there’s no such thing as free will. Can you explain why you hope everything is deterministic?

In my way of thinking, determinism is a prerequisite for "free will". People usually speak of free will as a the idea of making their own choices. Suppose you hypothetically take a snapshot of my exact physical/mental state at the instant of decision and replay it multiple times. If I always make the same choice, that's determinism. If the outcome of the decision is sometimes different, I can't call that a "choice" or free will. It was something random that I had no control over.
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