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C C
Jan 4, 2024 07:03 PM
(This post was last modified: Jan 4, 2024 07:03 PM by C C.)
https://iai.tv/articles/what-scientists-..._auid=2020
EXCERPT ( Carlo Rovelli): . . . It may seem natural to think that strange things happen at the bottom of the funnel, down in the center of the black hole.
But this is not the case. In the center of the funnel there is only the falling star; we are not in singularity territory. Here, the equations still work.
Time . . . It is always the crux of the matter. Down there, at the bottom, time has slowed tremendously. Outside, millions of years may have passed, while down there just a few fractions of a second . . . The star is still falling at the bottom of the long funnel that is stretching and narrowing, because in its time no more than fractions of a second have passed. So the zone where the distortions become infinite, where the equations of Einstein stop working, the interesting zone . . . is not there!
So where is it? It is in the future. It is in what happens after the interval of time depicted in the last image. It is in the grey area of the image below.
As the diameter of the funnel narrows, the cylinder becomes more curved, like a roll that is rolled tighter. The more the funnel is narrowed, the greater the distortion of space-time. When this reaches the fateful “Planck scale,” the scale where we expect space and time to be seriously affected by quantum phenomena, we enter the region where these phenomena imply that Einstein’s equations are violated... ( MORE - details)
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Zinjanthropos
Jan 5, 2024 03:48 PM
(This post was last modified: Jan 5, 2024 05:30 PM by Zinjanthropos.)
(Jan 4, 2024 07:03 PM)C C Wrote: https://iai.tv/articles/what-scientists-..._auid=2020
EXCERPT (Carlo Rovelli): . . . It may seem natural to think that strange things happen at the bottom of the funnel, down in the center of the black hole.
But this is not the case. In the center of the funnel there is only the falling star; we are not in singularity territory. Here, the equations still work.
Time . . . It is always the crux of the matter. Down there, at the bottom, time has slowed tremendously. Outside, millions of years may have passed, while down there just a few fractions of a second . . . The star is still falling at the bottom of the long funnel that is stretching and narrowing, because in its time no more than fractions of a second have passed. So the zone where the distortions become infinite, where the equations of Einstein stop working, the interesting zone . . . is not there!
So where is it? It is in the future. It is in what happens after the interval of time depicted in the last image. It is in the grey area of the image below.
As the diameter of the funnel narrows, the cylinder becomes more curved, like a roll that is rolled tighter. The more the funnel is narrowed, the greater the distortion of space-time. When this reaches the fateful “Planck scale,” the scale where we expect space and time to be seriously affected by quantum phenomena, we enter the region where these phenomena imply that Einstein’s equations are violated... (MORE - details)
Read that over a couple times but alas, it goes beyond my comprehension. However a few thoughts* crossed my mind during the read. Here they are:
1. Time is gravity
2. Time causes gravity
3. BH’s create the future in all directions
4. All objects are attracted by the future
5. Time is constantly being recycled (or past is erased…idk )
*things I thought the author was trying to say…not gospel by any means. lol
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stryder
Jan 5, 2024 06:48 PM
(This post was last modified: Jan 5, 2024 07:20 PM by stryder.)
(Jan 5, 2024 03:48 PM)Zinjanthropos Wrote: Read that over a couple times but alas, it goes beyond my comprehension. However a few thoughts* crossed my mind during the read. Here they are:
1. Time is gravity
2. Time causes gravity
3. BH’s create the future in all directions
4. All objects are attracted by the future
5. Time is constantly being recycled (or past is erased…idk )
*things I thought the author was trying to say…not gospel by any means. lol
Some points I consider:
If you had an absolute vacuum, devoid of all energy (including zero-point). You can not reduce any further (there would be nothing to take from nothing) Thats the absolute minimum as a bound. You couldn't have a blackhole speghettifying in an absolute vacuum as it wouldn't have anything to materialise with, it needs substance.
It should also be considered that there is an upper bound to how much energy can occupy any given volume of space. At some point you wouldn't be able to add more energy to a given volume without it requiring to spillover. That's why it's suggested that blackholes extend their volumetrics through distorting spacetime (Bekenstein bound) and effecting the flow of time (event horizons)
I tend to think of blackholes as requiring an entire galaxy to create, where all moving bodies within that galaxy generates a super-Lagrange point (multiple lagrange points applied together) It means the initial gravitation event of a blackhole wouldn't be made from mass at all initially, however it would pull mass into it since it's empty but suggestibly as it fills it would stabilise (as the lagrange points would shift as it increases it's own gravitational field). It would eventually effect the galaxies shape (allowing it to spread out further)
Further to that point I tend to think of Gravity as a combination of the moving bodies within mass. I'd assume that if there is structure liquification from super-massing to the point of plasma, that gravity would no longer function the same way anyway. Which is why I consider the super-Lagrange point method as being the way to create a gavitational effect even without the structural functions.
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C C
Jan 5, 2024 11:53 PM
(This post was last modified: Jan 6, 2024 12:33 AM by C C.)
(Jan 5, 2024 03:48 PM)Zinjanthropos Wrote: Read that over a couple times but alas, it goes beyond my comprehension. [...]
Due to the extreme warping of spacetime, he's saying that change is occurring so slowly for the collapsing star (compared to the rate of change outside the black hole) that the singularity does not actually exist yet, or does not exist here in our present era. But billions or trillions of years in the future (whatever amount is required to complete the process, at that incredibly lethargic pace).
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Zinjanthropos
Jan 6, 2024 02:36 AM
(Jan 5, 2024 11:53 PM)C C Wrote: (Jan 5, 2024 03:48 PM)Zinjanthropos Wrote: Read that over a couple times but alas, it goes beyond my comprehension. [...]
Due to the extreme warping of spacetime, he's saying that change is occurring so slowly for the collapsing star (compared to the rate of change outside the black hole) that the singularity does not actually exist yet, or does not exist here in our present era. But billions or trillions of years in the future (whatever amount is required to complete the process, at that incredibly lethargic pace).
Oct 30, 2023 Bigthink.com :
Quote: By combining information about stars, black holes, and stellar and cosmic evolution all together, astronomers have the first robust estimate for black holes in the Universe: 40 quintillion. It's more than almost anyone expected.
I imagine more on the way.
I guess there’ll be a lot of singularities popping into existence at various times in the vast distant future. Will there be a universe for them to exist in or do they make their own just in case nothing’s there?
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Kornee
Jan 6, 2024 05:48 AM
It was hard for me to believe the OP linked article was being completely serious. Not owing to the long known but institutionally ignored fundamental flaws in GR per se.
Rather to the inconsistency within that classical GR paradigm clearly evident in the illustrated funnel diagrams. An obvious inconsistency no-one else here will be capable of seeing.
Namely - the time progressive shrinking of the EH area depicted. Directly implying a shrinking externally observed BH gravitational mass. All without any reference anywhere in the article to incorporation of so-called "Hawking radiation/mass evaporation". That is totally inconsistent with the classical GR stipulation that external mass is time invariant.
Now - feel free to continue blathering on about irrelevant musings. In the SV tradition!
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