Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

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

port.ac.uk

Post reply on HN
Print view View original

581–590 of 647 posts

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

#581

Post by lugu »

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…

[flagged]

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

#582

Post by teaearlgraycold »

nwienert wrote: post #580
teaearlgraycold wrote: post #561

Earlier quoted context omitted.

Might just be a reflection of my enjoyment of life. I’ve been very lucky on most aspects. Perhaps if things were worse I’d wish for the knowledge that it could have gone differently. But also it would be super trippy and interesting. Knowing just the mass of the universe you’d be able to peer into any time, past or present, and see exactly what happened. But then what happens around areas where people look into the l…

Not much concern for all the people less lucky than you?

Just explaining where my ideas on determinism might come from. It’s not as though I can change the laws of physics to be one way or the other.

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

#583

Post by rendx »

asveikau wrote: post #526
rendx wrote: post #314

Earlier quoted context omitted.

Isn't identity exactly defined as what one perceives as part of oneself? Food becomes me as soon as I dis-member it to make it to be part of myself. Other food becomes you. This doesn't make food not within my sphere of perception a part of me; before digestion, it stays separate, like a virus doesn't become part of me -- the immune system acts a biological discriminator between what is part of me, and what is not. Y…

Seems like a long-winded way to say you suffer from anxiety. > like a virus doesn't become part of me -- the immune system acts a biological discriminator between what is part of me, and what is not But what about symbiotic organisms? What about your microbiome? Or the mitochondria, which began its existence as a separate organism? Or, they say our DNA includes many viruses that our ancestors contracted. A number of…

Exactly? I agree that identity is a fuzzy construct which includes socially constructed elements, and is not a fundamental "thing" that can be observed externally and then named "identity". I disagree that it is therefore "fiction"; as a concept, it is very real? My point was that I don't see how you can claim that identity is nonexistent ("lack of identity"), since the moment I use the term, I "create" and "have" it; it is a flexible enough umbrella to include the distributed system of my body, since I cannot exist separately from it? What "belongs to me" contributes to my identity.

To pick one possible simple and broad definition from WP, "Identity is the set of qualities, beliefs, personality traits, appearance, or expressions that characterize a person or a group." -- you made it sound like that set is empty, which doesn't make sense to me. My identity is part of "I". Every being has an identity; it's not something you can get rid of?

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

#584

Post by mc32 »

nbulka wrote: post #572
kosh2 wrote: post #515

I have two problems / questions with this: 1. This theory requires a parent universe that can't have been formed inside a black hole. This means there must a be second "universe creation" mechanism that we can / may never know about from our child universe. For me, this doesn't really answer the true question: "How did our universe begin?" Yeah, it may the "unknown field with strange properties" but instead we get an…

We think the universe had to "begin" because we "began" and tend to anthropomorphize. Is that necessarily true? The universe is under no obligation to have a beginning. Sail around the Earth and you might just end up right where you started.

The Sun had to begin. At one point it was just accreting gasses, then at some point gained enough mass to ignite. People also start at some point they begin as a daughter and grow eventually into a viable life. But also our galaxies had to form before our sun. So, yes there are beginnings to things. At one point they weren’t, at another point they were.

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

#585

Post by jungturk »

nbulka wrote: post #572
kosh2 wrote: post #515

I have two problems / questions with this: 1. This theory requires a parent universe that can't have been formed inside a black hole. This means there must a be second "universe creation" mechanism that we can / may never know about from our child universe. For me, this doesn't really answer the true question: "How did our universe begin?" Yeah, it may the "unknown field with strange properties" but instead we get an…

We think the universe had to "begin" because we "began" and tend to anthropomorphize. Is that necessarily true? The universe is under no obligation to have a beginning. Sail around the Earth and you might just end up right where you started.

Yes, but earth still had a beginning.

I agree with you, though - causal explanations are compelling and confer a sense of certainty and humans seem to like that, but it doesn't make them necessary.

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

#586

Post by inimino »

hyperhello wrote: post #405
inimino wrote: post #403

Earlier quoted context omitted.

If the solution is ever more manuscripts that solve no interesting problems and that nobody will ever read, let's find another solution.

Why would you assume someone would write the paper at all, if the problem was uninteresting?

For one thing, because I watch the AI and ML categories on arxiv.org.

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

#587

Post by EasyMark »

hshshshshsh wrote: post #195

Big bang theory no longer excites me. As long as we can't explain consciousness all these theories are pointless. All theories mere appearances in consciousness including the universe and everything we experience. Consciousness has the property to render infinite universes and theories. But we have no clue how universe creates consciousness.

Seems like someday we will prove that if you get enough neural like things organized in a structure similar to ours or some mathematical similarity thereof that consciousness automatically arises like mixing certain elements to get a compound but in a vastly more complex manner

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

#588

Post by godelski »

mcswell wrote: post #533
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…

>> 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 example should make you think about mass. Without relativistic effects the mass inside the barn is only part of the ladder. With relativity, the whole ladder, and thus mass, is inside. So yeah, weird things happen.

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

#589

Post by jasonm23 »

rendaw wrote: post #487
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.)

Communication skills are often missing in engineering too, but I think I'd argue they should be required - all work is fundamentally collaborative. Being able to effectively communicate to different people on your team, outside your team, managers, business people, etc is not optional and more than once I've seen things get stalled or turn into a mess because communication didn't happen. STEM is often a haven for neu…

"Required" is a bit of a gatekeeper, while I agree good communication skills are valuable.

Blog form content in particular, _requires_ proofing, re-editing, and so on and there's a whole skill set which contributes to makes such content sticky and engaging.

You also seem to be confounding your own point. Indeed all work is collaborative, someone who lacks communication skills, will generally team up with other collaborators who can bring those skills to bear.

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

#590

Post by achillesheels »

>We are not special, no more than Earth was in the geocentric worldview that led Galileo (the astronomer who suggested the Earth revolves around the Sun in the 16th and 17th centuries) to be placed under house arrest.

Wow - like this anti-humanist prejudice is totally 1993. And not in a good way.

two-photon collision experiment has permitted humans to hypothesize a simpler explanation to the beginning of the creation of more electromagnetic forces, which obviously behave differently than how are bodies were designed to receive them i.e. evolutionary biological bandwidth...

Post reply on HN