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Researchers spot black hole feeding at 40x its theoretical limit

arstechnica.com

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Re: Researchers spot black hole feeding at 40x its theoretical limit

#31

Post by scotty79 »

cowsup wrote: post #26
duerra wrote: post #7

I think once we finally get this all sorted out, future humans will find it hilarious that so many people were convinced that dark matter was real and particles we could not detect made up 80% of the universe.

I find such thoughts exciting. In the future, children will be taught basic facts that, to us in the first half of the 21st century, are some of the most complicated questions of the universe.

I think knowledge about universe will be mostly the same but streamlined. In our modern day science we have a lot of concepts that exist only because of the path we took to get to where we are now.

Most of these interpretations will be cut out once a better ways to proper undestanding is found. I imagine electrons shells, wave function collapse, pseudo-vectors, relativistic mass, xyz ... will go away quickly to be replaced with more suitable concepts previously (and still) held back by necessity of humans to be able to do some math with pen and paper.

Re: Researchers spot black hole feeding at 40x its theoretical limit

#32

Post by Permik »

leptons wrote: post #25
techjamie wrote: post #19

Earlier quoted context omitted.

> Maybe the big bang was a result of the birth of another black hole somewhere else, and that the rapid expansion rate of the early universe was due to the a huge amount of matter converted into dark energy by this black hole There is actually a theory that black holes create universes inside them, and that our universe could be underneath countless layers of black holes forming universes that form black holes ad inf…

>There is actually a theory that black holes create universes inside them Calling it a "theory" is kind of wrong, it's not a "theory" according to the classical definition of the word. The word has been diluted over time to mean any thought anyone has about anything, but it used to mean something that has been proven by observation and empirical evidence. Yes, I'm being pedantic. > A "classical" definition of a theor…

Theories are always in a sense speculative, as they build upon other theories and measurements. And as measurements aren't definitive, but just a standardized way of comparing results, theories are just an abstract framework how we have a shared understanding of the world around us.

Theories usually are just based on other theories and just create a theory from the current available data. The less data you have, the larger the possible space that your theory might lie in.

Hypotheses are usually things that rework theories because we have some new data that showed that our theories were inaccurate/false/invalid and builds a new framework that more accurately models the data and theories that we have.

Take this just with grain of salt, this is just a philosophical view of the meanings of the words as I understand them.

Re: Researchers spot black hole feeding at 40x its theoretical limit

#33

Post by ggambetta »

duerra wrote: post #7

I think once we finally get this all sorted out, future humans will find it hilarious that so many people were convinced that dark matter was real and particles we could not detect made up 80% of the universe.

THANK YOU. I've been saying this for years: https://news.ycombinator.com/item?id=21279144

Re: Researchers spot black hole feeding at 40x its theoretical limit

#34

Post by gooseyard »

aurareturn wrote: post #8

On the topic of black holes, there is a recent paper on black holes potentially converting mass into dark energy: https://iopscience.iop.org/article/10.1088/1475-7516/2024/10... I'm not a physicist but it's interesting to think about the implications: 1. No singularity at the center of a black hole 2. Universe's expansion rate is not constant because it's blackholes powering it with matter 3. Eventually expansion slo…

you might enjoy some of Lee Smolin's writing on the "Fecund Universes Theory"

Re: Researchers spot black hole feeding at 40x its theoretical limit

#35

Post by prettyStandard »

deadbabe wrote: post #17
prettyStandard wrote: post #15

Earlier quoted context omitted.

It's not crazy. I'm no physicist, but I understand the math of the Big bang is similar to that of a White hole. What gets a little mind bending for me is the idea that the physics inside the black hole can differ slightly from the ancestor universe. So black holes will preferentially create descendant universes that prefer to create more black holes. This is a different multiverse theory than the quantum many worlds…

Not even close. There’s an infinite amount of numbers in between 0 and 1. But in an infinite multiverse for each of those numbers, you could never see 2.

Thanks, this is helpful.

So first we need to answer does math follow physics or does physics follow math?

If math follows physics, and the physics is changing across universes in the multiverse in question, then no you're assertion is wrong.

If physics follows math, then we would have to go up the level higher, and we're not talking about that right now.

Re: Researchers spot black hole feeding at 40x its theoretical limit

#36

Post by toast0 »

MrMcCall wrote: post #10
Ygg2 wrote: post #5

Earlier quoted context omitted.

Maybe phlogiston really has both negative and imaginary mass. /Snark I think this and JWST early galaxy findings mean we don't really understand gravity.

Phlogiston is such a great bit of the history of "science". >> we don't really understand gravity I would say that what we don't understand is how the universe is structurally layered, vibrationally/dimensionally. That 5/6ths of the matter is missing lines up with our physical dimension (of energy and matter) being only one of six onionish dimensional layers, all contained within the same 3-space. The five dimensions…

> Phlogiston is such a great bit of the history of "science".

Based on a quick read on wikipedia, Phlogiston goes well with darkons and holes.

Re: Researchers spot black hole feeding at 40x its theoretical limit

#37

Post by [deleted] »

machina_ex_deus wrote: post #27
dustingetz wrote: post #24

Earlier quoted context omitted.

No, this depends on your choice of coordinate system - has been debunked N times on physics reddit in virtually every thread that it comes up. The EH itself is not a singularity in the observers reference frame as they cross it nor do they particularly notice when they do.

I never said EH is a singularity. I said you could notice you're inside as your timelike coordinate becomes the radial coordinate. That's something you could easily notice if you look around, it would correspond to a shrinking universe, and our universe is expanding. The "you won't notice crossing the event horizon" troupe is true only in a very local sense. If you move around and observe the geometry around you, you…

[deleted]

Re: Researchers spot black hole feeding at 40x its theoretical limit

#38

Post by dustingetz »

machina_ex_deus wrote: post #27
dustingetz wrote: post #24

Earlier quoted context omitted.

No, this depends on your choice of coordinate system - has been debunked N times on physics reddit in virtually every thread that it comes up. The EH itself is not a singularity in the observers reference frame as they cross it nor do they particularly notice when they do.

I never said EH is a singularity. I said you could notice you're inside as your timelike coordinate becomes the radial coordinate. That's something you could easily notice if you look around, it would correspond to a shrinking universe, and our universe is expanding. The "you won't notice crossing the event horizon" troupe is true only in a very local sense. If you move around and observe the geometry around you, you…

https://www.reddit.com/r/askscience/s/vwCegmNdOE ?

Re: Researchers spot black hole feeding at 40x its theoretical limit

#39

Post by gpderetta »

machina_ex_deus wrote: post #22
aurareturn wrote: post #8

On the topic of black holes, there is a recent paper on black holes potentially converting mass into dark energy: https://iopscience.iop.org/article/10.1088/1475-7516/2024/10... I'm not a physicist but it's interesting to think about the implications: 1. No singularity at the center of a black hole 2. Universe's expansion rate is not constant because it's blackholes powering it with matter 3. Eventually expansion slo…

The universe is not inside a black hole. Inside black holes the radial coordinate is time like, which is definitely not true in our universe, where the time coordinate is timelike, and the radial coordinate is space like. Inside of black holes looks nothing like ordinary spacetime. Inside black hole, everything in your future is with decreasing radial coordinate, which means space is shrinking until you hit the singu…

There is a singularity in our past. Are we in a white hole?

Re: Researchers spot black hole feeding at 40x its theoretical limit

#40

Post by machina_ex_deus »

dustingetz wrote: post #38
machina_ex_deus wrote: post #27

Earlier quoted context omitted.

I never said EH is a singularity. I said you could notice you're inside as your timelike coordinate becomes the radial coordinate. That's something you could easily notice if you look around, it would correspond to a shrinking universe, and our universe is expanding. The "you won't notice crossing the event horizon" troupe is true only in a very local sense. If you move around and observe the geometry around you, you…

https://www.reddit.com/r/askscience/s/vwCegmNdOE ?

The fact that radial coordinate is timelike inside the event horizon doesn't change when you change coordinate systems. The radial direction remains timelike in kruskal coordinates. Direction being space like or time like is independent of coordinate system.
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