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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

#191

Post by Morizero »

mrtksn wrote: post #106
lagrange77 wrote: post #98

Earlier quoted context omitted.

Of course these are models. And to be able to recognise that entropy increases with time is an example for their usefulness.

Does it increase over time or does it do its thing and in our model we decided that stages of it is called time?

Absolute entropy of a system is calculated either by integrating heat capacity/temp at constant pressure from 0kelvin to the measured temperature, or by calculating via Shannon's method using average amount of information in a discrete random variable.

There is no time factor in any absolute entropy equation.

Empirically, if you measure the entropy of a closed system at a given time, and you measure the entropy of that same closed system at a different time, then calculate the deltas of each, their signs match so long as the time delta is finite and the system isn't empty. So stated plainly, as time increases, so does entropy.

By combining these first principle formulae with the empirical results on entropy, you arrive at the second law of thermodynamics. However, like I said before, we're not really sure why the signs match and it's considered to be an unsolved problem in physics.

https://en.wikipedia.org/wiki/List_of_unsolved_problems_in_p...

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

#193

Post by duped »

twodave wrote: post #51
bmacho wrote: post #25

> The Big Bang is often described as the explosive birth of the universe – a singular moment when space, time and matter sprang into existence. It is indeed "often described" in the media as such. However, that is _not_ the currently accepted theory. "What if there were no space and time before the Big Bang" is just Stephen Hawking's pet theory.

Might as well believe in God if you’re going to believe in spontaneous accidental creation…

There's quite a big philosophical difference between "there exists a point beyond which it is possible to make observations" and "the universe was created by an omnipotent being"

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

#194

Post by DrammBA »

bmacho wrote: post #126
koakuma-chan wrote: post #82

Earlier quoted context omitted.

What is the currently accepted theory?

We have no theories working at those conditions. Wiki says > General relativity also predicts that the initial state of the universe, at the beginning of the Big Bang, was a singularity of infinite density and temperature.[6][obsolete source] However, classical gravitational theories are not expected to be accurate under these conditions, and a quantum description is likely needed[7]. https://en.wikipedia.org/wiki/Gr…

> [6][obsolete source]

I didn't know but apparently wikipedia treats old sources as obsolete, doesn't matter if there's new information or not that would make it obsolete.

I wonder if any sources supporting the notion that the earth is round must be updated every couple of years with a new source or study.

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

#195

Post by hshshshshsh »

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.

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

#197

Post by didibus »

echelon wrote: post #169
afroboy wrote: post #130

I'm not a scientist or astrophysicist but i do believe in science, is it ok to believe that we as humans and all our scientific development still very very far from proving anything remotely close to how the universe got created? I feel this subject is for humanity in year 2600 to start discussing it. Scientist still can show their theories and search papers and i can't understand a shit but i don't believe in any th…

I have immense respect for astrophysicists, but the data we're dealing with is extremely far away and relies on a lot of interlocking assumptions. I stumbled upon this paper [1, 2] last night that challenges the CMB, and thus the underpinning of much of our understanding about the age and evolution of the universe. As a layperson, I don't know the impact factor of the "Nuclear Physics B" journal - if this is just jun…

> But I get skeptical when I see claims that we know how the universe began or how it will end

Absolutely, but you are interpreting it in the rewritten headline money making attention grabbing version.

The original version of the claims always say that from some observation, experiments, and projection from known models it derives that the universe likely began this way, or will end that way, etc.

That means, of all the going hypothesis, this might be the one with the best chances of being true, or close to the truth. It's not an absolute, but its the one that has the most chances due to the evidence behind it.

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

#198

Post by account-5 »

meindnoch wrote: post #101

I've read somewhere an article which posited that our 3D universe might be inside a 4D black hole. When you cross a black hole's event horizon, the radial coordinate becomes timelike, so you lose one degree of spatial freedom. Movement is still possible in the tangential directions however, so what you get is basically an N-1 dimensional universe. So maybe our 3D universe is actually matter that fell into a 4D black…

What's in a 1D black hole?

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

#199

Post by RGamma »

mmh0000 wrote: post #167
HocusLocus wrote: post #135

Suggested hard sci-fi light reading: "Cosm" by Gregory Benford, 1999. A universe the size of a bowling ball created in a laboratory. The scientist responsible for it, keeping it safe and on the run from gvt spooks. They want to protect it for as long as it lasts, and since its time is as relative as its size, they won't have long to wait.

Added. Opinions: A) I love all the scifi book recommendations that cone up on HN B) i wish you’d all stop recommending great and amazing books. My queue is so backlogged and jammed I'm never going to catch up.

What's a couple dozen books (and video games) in my backlog when I have a thousand websites there?

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

#200

Post by EasyMark »

afroboy wrote: post #130

I'm not a scientist or astrophysicist but i do believe in science, is it ok to believe that we as humans and all our scientific development still very very far from proving anything remotely close to how the universe got created? I feel this subject is for humanity in year 2600 to start discussing it. Scientist still can show their theories and search papers and i can't understand a shit but i don't believe in any th…

But that's why science is so cool, it doesn't matter what we believe, it only matters if your theory fits the facts and makes good predictions. If it doesn't, you can chuck it in the bin without guilt. Unlike beliefs, which often can cause psychic trauma if reality doesn't match the belief of the individual.
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