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Eldar Black Holes

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Re: Eldar Black Holes

#31

Post by vbezhenar »

pwaai wrote: post #15

what if our universe is expanding because there are other bubbles of universes that pull in all directions? what if Buddha was right in that there are thousand fold universe systems each with their own unique civilizations? If there are blackholes older than the universe itself, what if that suggested the universe was cyclical and that we may be in some gazillion-th iteration? what if big bang was just a universe eve…

https://accesstoinsight.org/tipitaka/sn/sn56/sn56.046.than.h...

Doesn't look like a description of black hole, honestly.

Re: Eldar Black Holes

#32

Post by pwaai »

grondilu wrote: post #8

There is a fascinating PBS Space Time video[1] about black holes that questions the very existence of whatever is "inside" a black hole. They point out that as you approach a black hole, your proper time is advancing slower and slower when compared to an observer located far away from the black hole (like us, on Earth). That means that from the point of view of this far observer, nothing happens inside a black hole u…

> https://www.youtube.com/watch?v=vNaEBbFbvcY

This is mind blowing...shatters my misconception of blackholes....is there any more books on this?

Re: Eldar Black Holes

#34

Post by dghughes »

From one of the article links, " aliens can live inside black holes."

>They would also be brightly illuminated by the central singularity and by photons trapped in the same orbit.

That sounds creepily like a typical description of heaven. Timeless, ageless, godlike beings all in a region of intense uniform brightness.

Re: Eldar Black Holes

#35

Post by mtgx »

olegkikin wrote: post #12
grondilu wrote: post #8

There is a fascinating PBS Space Time video[1] about black holes that questions the very existence of whatever is "inside" a black hole. They point out that as you approach a black hole, your proper time is advancing slower and slower when compared to an observer located far away from the black hole (like us, on Earth). That means that from the point of view of this far observer, nothing happens inside a black hole u…

That's the thing that never made sense to me about the black holes. The closer you are to the event horizon, the faster the time passes for the universe around you. So reaching the event horizon should take infinite amount of the "outside time", so right before you reach the horizon, you should see the whole future of the universe, including its end, if there's any. So how do black holes gain any mass then?

Doesn't it mean that only the space around the black hole sees that "infinite amount of time" pass, and not the whole universe?

So in that case, you wouldn't be seeing the "future of the universe" just the "future" (I guess) of the space around the black hole.

I kind of see blackholes in space as vortexes in a lake. Anything that gets "trapped" in the vortex moves much faster, including the water (space-time) itself. It doesn't impact the rest of the lake, except for the things that are on a collision course with the vortex, and then get swallowed by it (and spit back out?).

Re: Eldar Black Holes

#36

Post by provost »

pwaai wrote: post #32
grondilu wrote: post #8

There is a fascinating PBS Space Time video[1] about black holes that questions the very existence of whatever is "inside" a black hole. They point out that as you approach a black hole, your proper time is advancing slower and slower when compared to an observer located far away from the black hole (like us, on Earth). That means that from the point of view of this far observer, nothing happens inside a black hole u…

> https://www.youtube.com/watch?v=vNaEBbFbvcY This is mind blowing...shatters my misconception of blackholes....is there any more books on this?

It was interesting to watch, but the presenter presents everything as truth, but aren’t many of his explanations still theories? I’d like to see what other competing theories there are..

Re: Eldar Black Holes

#37

Post by nightcracker »

metaobject wrote: post #23
grondilu wrote: post #19

Earlier quoted context omitted.

> So how do black holes gain any mass then? Well, from our point of view all incoming mass gets stuck very close to the event horizon. That's not too surprising considering the amount of information of a black hole is proportional to its surface area. So from a far away observer a black hole is more like a sticky sphere than an hollow ball.

Doesn't the surface area increase as the BH takes on more mass?

I like the analogy of a snowball, nothing ever enters it yet it grows.

Re: Eldar Black Holes

#38

Post by dhruvparamhans »

IntronExon wrote: post #30
grondilu wrote: post #8

There is a fascinating PBS Space Time video[1] about black holes that questions the very existence of whatever is "inside" a black hole. They point out that as you approach a black hole, your proper time is advancing slower and slower when compared to an observer located far away from the black hole (like us, on Earth). That means that from the point of view of this far observer, nothing happens inside a black hole u…

This strikes me as an issue between understanding these events from the point of view of an external observer, and a test particle or person falling into the hole. From the POV of the observer, your statements are largely accurate, for certain types of universes. For the test particle, there is no freeze frame, all proceeds normally. The key is the Relative in Relativity. Truthfully, there is no clear answer as to wh…

Probably the most accurate comment here.

Re: Eldar Black Holes

#39

Post by IntronExon »

wcarss wrote: post #18
grondilu wrote: post #8

There is a fascinating PBS Space Time video[1] about black holes that questions the very existence of whatever is "inside" a black hole. They point out that as you approach a black hole, your proper time is advancing slower and slower when compared to an observer located far away from the black hole (like us, on Earth). That means that from the point of view of this far observer, nothing happens inside a black hole u…

off-topic a bit: does anyone have suggestions for paths for the layperson toward being able to reason and intuit about this stuff at one level beyond pop physics claptrap? I have heard "the theoretical minimum" suggested in the past, but I haven't heard from anyone who has actually used it to go from zero to say, general relativity, only people who think it sounds good. It also seems like a steep investment -- I just…

Www.physicsforums.com has a ton of resources you may find useful.

Re: Eldar Black Holes

#40

Post by analog31 »

grondilu wrote: post #8

There is a fascinating PBS Space Time video[1] about black holes that questions the very existence of whatever is "inside" a black hole. They point out that as you approach a black hole, your proper time is advancing slower and slower when compared to an observer located far away from the black hole (like us, on Earth). That means that from the point of view of this far observer, nothing happens inside a black hole u…

Here's something I've wondered about black holes, related to what's inside. Simplistically, there must be mass inside, i.e., every black hole has a mass that can somehow be measured, e.g., by orbital velocities of satellites. And the mass-energy has to equal the mass-energy that has fallen in. So far so good.

But the stuff that falls in is not purely described by its mass. It also has angular momentum, electrical charge, maybe a few other quantities such as charm and strangeness (speculating here). So the black hole must have a net angular momentum, electrical charge, charm, and strangeness. Electrical charge could be measured by holding an electrometer next to the black hole. And so forth.

So far I've described 5 quantities that "describe" a black hole. So my question is: How many more are there? What's the total number of numbers that accompany a particle as it gets sucked in?

Suppose it's a small number, like 11. Does that place an upper limit on the information content of a black hole, and hence the possibility of describing a "civilization" inside it?

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