What If Black Holes ARE Dark Energy?

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We tend to imagine there are connectings between things that we don’t understand. Quantum mechanics and consciousness, aliens and pyramids, black holes and dark matter, dark matter and dark energy, dark energy and black holes. Usually there’s no real relationship whatsoever, but this last pair-black holes and dark energy being the same thing-has received some recent hype in the press. Let’s see if it might actually be true.
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Опубликовано:

21 мар 2023

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Комментарии : 2,1 тыс.

@pbsspacetime Год назад

Hey Space Timers! Want to deep dive some Space Time and watch ALL the episodes referenced in this week's episode? Then check out our episode companion playlist: ru-vid.com/group/PLsPUh22kYmNAO4wmE0sua4zqcs0D7eqv7

@kindlin Год назад

That's a great idea! These videos are so massive in their undertaking that at least 5 other videos can be directly recommended, while those 5 will each lead down their own rabbit holes.

@onetruth5183 Год назад

If we live in a blackhole, this is all moot.

@k_tess Год назад

Hey could anyone help me with something. The geometry around a blackhole just simply would not allow for this correct? The very space around a black hole falls INWARD toward the singularity. To get expansion the solution for that is a whitehole. Isn't it?

@sureshbaliyan3655 Год назад

@@k_tessthere are many unknown forces around black holes. Atom nuclei we predicted many particles to explain the stability of nucleus , simmilar theory required to explain structure of black hole😢

@Stroheim333 Год назад

If the new theory in the video is correct, then you can bet that black hole's dark enery is also responsible for the phenomenon we now ascribe to black matter.

@Screamo_RC Год назад

"People love to imagine things that they don't understand are somehow connected to each other" Me, that's me, I'm people.

@frinoffrobis Год назад

lol, I'm so happy for you 😊

@markmuller7962 Год назад

I'm atheist and very skeptical in general

@Just_a_Reflection Год назад

@Mark Muller Just stay open-minded, fervent about finding the truth, and willing to accept it if you find it, even if it negates everything you may have previously believed.

@markmuller7962 Год назад

@@Just_a_Reflection You're contradicting yourself, being skeptical and atheist means not holding any kind of belief Edit: Your name explains everything I guess

@Rydonittelo Год назад

@@markmuller7962 Yea, you'll probably grow out of that by the time you are 30 kiddo. I found it an awful lot easier to be an atheist in my 20s when I still thought I knew everything 😁👍🏻

@DrBecky Год назад

Thanks for the shoutout Matt and co! Great to see some of the historical cosmological context covered 👍

@MacNif Год назад

Love your content Dr. Becky!

@markh9836 Год назад

This is the RU-vid space channel synergy I've been waiting for!!! 😃

@alean79 Год назад

Awesome channels, both Dr. Becky and Matt's PBS Space Time!!

@robhappier Год назад

Although I agree with being skeptical about a new observational experiment's conclusion. There are other observational experiments that had reached the same conclusion. Gravity = the spaceless and timeless vacuum energy state of matter!!! :)

@bierrollerful Год назад

Here's the link to Dr. Becky's video on that topic: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-3gg1OS435UE.html

@usopenplayer Год назад

I love how respectful you are in criticizing others' work. It's a hard skill to acquire, and you set a great example.

@ShawnTheRazor Год назад

He does it in such a way to where some people won't even notice. A beautiful skill to have.

@JohnGardnerAlhadis Год назад

It didn't strike me as criticism, but rather, a healthy degree of cautious scepticism. The grander the claim(s), the more it behoves the reader to remain cynical. And from what little my Neanderthal brain comprehended from this video, this paper's proposing some pretty massive claims (pun intended).

@aluisious Год назад

I feel the more time you spend trying to be productive and running into your own limits, the easier it can be to be humble critiquing others.

@theabyss5647 Год назад

Because it's not critique.

@SCP-5000 Год назад

He's just performing the script!

@jibbaspaa Год назад

I am but a very ignorant electrician , I have followed this channel for year , I get maybe 30-40% of what’s being discussed , but your presentation skills, you vibrant explanations , and your sheer intelligence makes every video a joy to consume , thanks for what you do

@johnnybhoy4278 Год назад

I remodel homes. Aka glorified handyman. I've been learning about astrophysics for decades and still I am unable to grasp most of it. I've always wanted to know the fundamental truth of reality.

@francescosegre Год назад

Same here, long time follower of the channel with zero background in astrophysics: I love the subject so much that I keep watching although I constantly make almost nothing out of it 🥲

@Dr.Yalex. Год назад

"the smarter your mind, the smarter your god"... 100% factual truth "ignorance is not a disease, but a state of mind"... also 100% factual truth I am over 60, and I can't stop educating myself, lol I know, I will continue learning daily - till the day I die....and that is a cig way into my great-grandmother's words "You live 100 years, you learn 100 years, yet you'll die an idiot". DO NOT stop learning!!!

@Dr.Yalex. Год назад

@@francescosegre keep watching... it will come!

@Dr.Yalex. Год назад

@@johnnybhoy4278 keep watching... understand will follow. On Wikipedia.com, choose "simple English" (if option is possible) to get the gist of anything before diving into the info fully... I do. helps a lot. Best of wishes and NEVER stop learning!

@ryanhoward4139 Год назад

"A black hole only knows about what falls into it" in my head became "The black hole knows what's inside it at all times. It knows this because it knows what isn't inside it."

@quentinpsausages Год назад

"For complicated reasons due to general relativity being weird" is now my go-to excuse for basically anything 😂

@jengleheimerschmitt7941 Год назад

"You've been late to work three times this month"

@bradleywalker8642 Год назад

@@jengleheimerschmitt7941 "But time is relative to each observer, so from my perspective, I wasn't late, you were just early."

@jengleheimerschmitt7941 Год назад

@@bradleywalker8642 ...now you sound like key and peele doing NDT...

@pinesyeet Год назад

PBS Space Time is in my opinion, the best science show I have ever seen. It's hard to put into words how much I love your videos. Absolutely fantastic work.

@ryanaromero Год назад

Check out Sea, also Space is Ace

@pinesyeet Год назад

@@ryanaromero Will do, thanks for the tip

@Lue_Kang Год назад

PBS Space Time, SEA and Anton Petrov are my top 3 space related channels. No sensationalized click bait, just straight up current scientific information. What a treat!

@elpatator Год назад

add cool words to the mix. dr kipping teaches at columbia and is a fantastic communicator with a way with words. him and SEA are my all time favorites.

@pinesyeet Год назад

Thanks everyone for great tips on channels, they're great!

@FunkyAbigail Год назад

What I'm hearing is that dark energy and thus black holes are actually the friends we made along the way.

@reptariguess Год назад

i really love when Matt changes his cadence going into the ". . . Space Time" outro

@windowsxpmemesandstufflol Год назад

This wasn't a good one for the outro

@cordlefhrichter1520 Год назад

That's the one thing I hate about these videos.

@whochecksthis Год назад

Thats the one thing i get in these videos

@bipolarminddroppings Год назад

This is the first "dark energy is just..." theory that actually makes some sense. It's probably wrong, but it's not obviously wrong, that's always a good start in science. Einstein and his greatest blunder is a fascinating story, all the more so when it turned out he was so damn smart that he actually got it right, for the wrong reason.

@Norantio Год назад

Thank you Matt! I was wondering if you and your show could cover "Quantised Inertia" theory at some point? A vehicle going to space to test the theory is going to space on a Falcon 9 soon, and I think more people would be interested to hear about it.

@oliviasvahn4090 Год назад

I love the phrasing “For complicated reasons due to relativity being weird…” 😂 So true! Wonderful video! I think I understood only 5% of it but it’s still wonderful! Great work!

@gurk_the_magnificent9008 Год назад

5%! Look at Ms Big Brain here 😅

@windowsxpmemesandstufflol Год назад

Damn, 5%?

@FleshWizard69420 Год назад

Spacetime tomfoolery

@pressaltf4forfreevbucks179 Год назад

My man understood regular matter and ignore dark matter and energy lol😂

@blakkwaltz Год назад

You guys are getting percents?

@johnmorrell3187 Год назад

I saw discussions of this showing up on news feeds and I thought to myself "I think I'll just wait for Space-time to hit this"

@robertfarrell6757 Год назад

I always look forward to the PBS Space Time video when a hot topic pops up in cosmology. I appreciate that the skepticism is expressed respectfully on this channel. And there should certainly be skepticism on these claims, but it is better to consider the possibility that the authors could be on to something rather than arrogantly dismiss them with a wave of the hand. This channel gets it right. Thanks for the continuing effort to help explain the topics to someone like me. I am a highly interested layperson, and the vast majority of other channels are either too basic for me, or far beyond anything I could understand without actually being a researcher in the field.

@mediawolf1 Год назад

I've watched a number of decent videos on this topic. That said, I've come to expect PBS Space Time to provide the clearest explanations, and this episode did not disappoint. 🙏

@ahpstudiostamil 11 месяцев назад

Dear brothers and sisters, I have published a series of papers (totally 9 nos.) on "Theory of Singularity" [Volume 10; issue 03,04; 2023] - arcjournals - International journal of advanced research in physical science - Open access for free download. 1) New representation of Gravitation 2) Structure of black holes 3) Finite structure of space-time. 4) Real dimensions of space-time 5) Singularity 6) Source of dark energy...etc "Fundamental theory of Singularity" - The new proposed study that serves one fundamental for general relativity and quantum mechanics by solving the incompatibility between them...thank you

@undeadwilldestroyall Год назад

Props to your motion design/VFX team. This might be some of their best work yet

@jasonschein Год назад

Came here to say the same thing. Amazing visuals on this episode!

@minibuns5397 Год назад

let’s just say everyone has their standards.

@HellXels Год назад

it's AI 🤣

@windowsxpmemesandstufflol Год назад

@@HellXels no it does have that unique style, not AI

@ChemEDan Год назад

@@windowsxpmemesandstufflol Prompt: Graphics in style of PBS spacetime AI: Gotcha fam

@Cornzilla888 Год назад

So glad you plugged Dr. Becky's channel. She has a great explanation.

@toddhenning8304 Год назад

Agreed! 💯%

@sunspot42 Год назад

Yeah, she actually studies the black holes in galactic centers and their evolution and she pretty much ripped this paper apart. Essentially, the authors ignored a lot of research from the past 20 years where we now better understand how the black holes in galactic centers grow, not just thru absorbing gas and stars but also via black hole mergers as larger galaxies swallow smaller ones and their central black holes.

@kelsey9069 Год назад

I love this jab at quantum consciousness. It feels fitting for the topic. I have a hard time making sense of it and it was explained to me in detail for a class I’m taking for my degree.

@robokaos69 Год назад

While I was watching this I took note of just how clean the camera footage is, and how well it's blended with the background and animations. Overall the visuals of videos on this channel are really well done, and I wish to voice appreciation of that.

@HolyAwe10 Год назад

I've seen almost every of your videos, for past 6-7 years, each of them terrific quality. Never bias, always factual with passion and realnest. Awesome content! 😉😁

@JacobAsmuth-jw8uc Год назад

Other than that weirdly pro Max Tegmark video that came out conveniently just a week after it was found that his organization was founding nazi extremist groups…

@himynameis3664 Год назад

Agreed. Had to laugh at a guy in one of the comment replies above you saying all Matt does is make up "pure unadulterated nonsense", and hopes that people that understand science don't see it and that enough people that don't understand the science believe his "nonsense".

@FussyPickles Год назад

And what have you learned in 7 years?

@dpeYoutube Год назад

I'd argue that PBS space time has a clear pro-reality bias.

@LuisSierra42 Год назад

@@FussyPickles it's a bot

@blablwy Год назад

Been looking forward to this video since the paper dropped. That was quick considering all the animation and editing, thanks spacetime!

@pikiwiki Год назад

thanks spacetime, for everything you do

@brenorocha6687 Год назад

"People love to imagine that things that they don't understand are somehow connected to each other." This explains so many behaviors! I'll keep this in mind from now on.

@MatterSpace Год назад

Been waiting for this one! Thank you Matt and team for another amazing video on a most fascinating subject! Visuals are insane btw, so well crafted.

@Niinkai Год назад

Black hole interiors are also coupled to healing pyramids, ancient aliens and the ghost of my dead cat. Crazy how nature does that!

@richardconway6425 Год назад

Your cat too??!!

@ericgraham8150 Год назад

Ghost in the Cat!

@mrping2603 Год назад

I always appreciate the detailed visuals. Keep up the good work!

@peters616 Год назад

I understood that paper's conclusions a little differently than how you set it forth in the video. As space-time expanded the black holes wound up with more space-time in them, space-time has an inherent vacuum energy, and because of the law of the conversation of energy requires the added energy inside the black holes to be balanced, it affects space-time outside of the black hole causing the acceleration of the universe around it. In other words, there is no separate stuff comprising dark energy it's just the vacuum energy of space-time combined with how that space-time expansion is interacting with black holes that causes the phenomena we observe that we attribute to dark energy.

@Tzphardi Год назад

Very insightful and well argued/thought out, thanks matt!

@SeraphimKnight Год назад

This paper sounds like a strong case of "having a conclusion before making the experiment" to me.

@minibuns5397 Год назад

Yeah like which publication

@DFloyd84 Год назад

"Come up with a theory that explains a thing, design experiments to test that theory, and record the results" are the basics of the scientific method, but another, just as important, part of the method is "rigorous adherence to honesty in your experiments and the willingness to accept when your theory is flawed."

@ericanderson9706 Год назад

@@DFloyd84 But wait, the theory is "99.8%" non-flawed! Close enough for jazz, as they say. And cosmology evidently.

@dalemoses2443 Год назад

I had the same response. The idea that old galaxies should have smaller black holes seems weird. Assume a galaxy that does not accrete more mass. Over time it’s black hole should increase in size. Which would make “black holes grow faster than their galaxies”

@elliott614 Год назад

Or just testing for correlation? It doesn't really say anything else as the space of explanations for that correlation (and all scientific explanations/theories-other-than-equations) is infinite, and we generally just use Occam's razor with no deductive logical basis to use it, sometimes more complicated explanations are the correct ones (though in the case of simplified models, it's more precise to formulate Occam's razor in terms of number of assumptions, and simplifying assumptions are assumptions)

@ganymedemlem6119 Год назад

The part of me that wants it to be true because of how neat of a solution it would be says "maybe it's the universe trying to remain topologically homogeneous?" But the desirable answer is often not the real answer.

@hellfire66683 Год назад

In the end the universe is going to do what it is going to do even if we think it shouldn't be able to do it.

@paulmichaelfreedman8334 Год назад

Which made me think of Matt's topic last year about primordial microscopic black holes with planck size. What if they are the even distribution?

@oskarskalski2982 Год назад

@@paulmichaelfreedman8334that's what I thought when he told about need for BH to be evenly distributed. But what about Hawking radiation, it should cause BH to shrink.

@memyshelfandeye318 Год назад

@@oskarskalski2982 But how big must a BH be to grow more from universe expansion than shrink from hawking radiation? Where would be the equilibrium?

@wreck-loose Год назад

I've thought of a similar situation. If our Universe is indeed 'inside' a Black Hole in a parent universe, the rate at which that Black Hole consumes matter determines the strength of Dark Energy and the rate of expansion of our Universe. A Black Hole that is consuming almost nothing would mean that the universe inside it would have a very slow expansion, while one that is feasting on a star would have a much faster expansion. I guess I'm implying that the Hubble 'Constant' is not constant, but depends on the amount of matter falling into our 'parent' Black Hole.

@narfwhals7843 Год назад

The hubble constant is already not constant. It's really the "hubble parameter". It is only constant across space(as far as we can tell), not time because the expansion rate changes with density.

@harryflashman3141 Год назад

My brain was blown as usual. Thanks, Matt.

@andreascj73 Год назад

If we use the inflated balloon as an analogy on expanding space, the geode black holes work like pressing a finger (or other object) on the balloon to get it to expand its surface with the existing gas inside it?

@grayshadowglade Год назад

Oooo I like this analogy since you could apply it to all mass actually. Most mass would have an impossibly small amount of push back against that expansion thus no visible expansion, but a SMBH would have a significant amount since it represents an impossibly huge cumulative pressure on the surface of the balloon by a fixed volume. You might have something to work with there.

@andrewsapuppo479 Год назад

If their claim, black hole growth is coupled with the expansion of the universe is true, then could they potentially figure out a way to calculate the vacuum energy density using this idea helping prove their theory? For example, by using Hawking’s equation for black hole entropy they could try to relate the vacuum energy density (VED) to a black holes surface area in the formula then rearrange the formula to come up with a new prediction of VED and see if this matches observed values.

@Jezee213 Год назад

Yes, I was wondering about Hawking Radiation.

@jusore Год назад

I often envision black holes tugging at the fabric of spacetime and spacetime like auxetic quantum foam. Look up a video titled "Auxetic Foam Research at HPMI" to see what an auxetic foam sample looks like. If the connection of black holes with dark energy is verified, the warp drive would have to be revised. Dark energy is said to be basically antigravity. It's something important for interstellar travel in reasonable time.

@nickrivich2356 Год назад

as a recently diagnosed person with autism, the connection between the things you mentioned in the beginning do in fact have a connection.

@robbabcock_ Год назад

Great video! This is a really intriguing idea, and one can see how people might wish it into existence. It's a novel take for sure, and it will be cool to see if the paper is dissected seriously by the community.

@bvbxiong5791 Год назад

in the english language "black" equates to "dark"...that's good enough for me.

@CedarAce1000 Год назад

I really appreciate the detailed breakdown at the end! Great to see specific reasoning as to the strong and weak points of a result :)

@erdemmemisyazici3950 Год назад

Currently the places to hope for a real space craft engine capable of taking us into the cosmos are in a few places as I understand it. There is little to no hope in negative energy being a thing. What does a graviton look like is definitely going to answer some questions. Are there fundamental forces we haven't discovered yet is lastly also super important. Fact of the matter is, light speed is not fast enough. We need to understand energy better. I suppose we will eventually start blowing up anti-matter bombs to observe conditions no longer existent in our current state of the galaxy and unlikely to occur again. Maybe some answers will be observable we haven't considered in such high energy events we can collect every possible information off of.

@dionysusbacchus4321 Год назад

Thank you for putting that famous paper in the proper and historically accurate context - especially since RU-vid hosts quite a few popular, rushed and inadequate "reviews".

@MadDragon75 Месяц назад

I recently find myself investigating the cyclic universe theory, black holes, singularities and now I find myself investigating Hawking Radiation And dark matter. What a wonderful mental journey.

@JonCofer Год назад

I don’t understand most of what he talks about, but I’m addicted to listening to it and trying.

@theorixlux2605 Год назад

I was under the impression there was no statistically significant correlation between Galaxy Size and black hole size. There are massive galaxies with no or small black holes and vice versa.

@oskarskalski2982 Год назад

Yeah but those are exceptions. If you look at this at sufficiently large sample the connection is there.

@ericgraham8150 Год назад

If I'm not mistaken, we currently are finding more and more evidence that intrinsically links blackholes and galaxy creation. Can you provide sources for wher you found massive galaxies with no blackholes or small ones? We originally had the problem of coming up with an answer of how super massive blackholes could be waves into existence back at the start of the big bang... I mean, if blackholes are the result of stars going supernova- what could super massive blackholes possibly from from if stars had barely even started to form... the answer.... huge mega astronomically large GAS CLOUDS, slowly collecting and stirring and collecting until it crossed some cosmic massive threshold in which gravity caused the masssssssive cloud to collapse... so this idea gives even more weight to the idea that super massive blackholes are part of galaxy formation

@theorixlux2605 Год назад

@@ericgraham8150 (note: I am more specifically referencing observed SM black holes and their parent galaxies. I don't believe primordial black holes were necessarily a part of the argument). I remember hearing Dr. Becky mentioning the lack of correlation in one of her older videos... so it's not much of a source. If I find the video, I'll bring it up. Meanwhile, I suppose I'm misremembering something since she didn't bring issue with my correlation question in her recent video.

@ericgraham8150 Год назад

@@theorixlux2605 It's cool- and I'm just a layperson like you too- so I'm not saying i'm an expert! I do know this has been a question for a long time, and just be the nature of science- they've always been hesitant to say "Every galaxy has a super massive black hole! Period!" But we also had doubts about whether black holes were even REAL objects for a long time, so i think this complicated the whole discussion too.... it wasn't until like the.... last decade?? that we've become absolutely comfortable in the idea that blackholes have crossed the threshold of theory and mathematical abstractions to something that is a physical phenomenon. In the past there was a lot more room to question the idea of blackholes in galaxies, because they are just so hard to friggin see!!!! i mean, we had a hard enough time proving our own supermassive blackhole in the milkyway- which took YEARS of study and earned a very distinguished lady scientist a nobel prize (i forget your name< im so sortry!!!!!) as our tools are becoming better and better, we are getting better at locating these blackholes

@oskarskalski2982 Год назад

@@ericgraham8150 it was Andrea Ghez but also Reinhard Genzel.

@Eulogy33 Год назад

I watched Dr. Becky's video on this first and this was an excellent follow up. Thank you.

@EnglishMike Год назад

Shots fired! The fact that Matt is willing to use the d-word ("dishonest") in his characterization of the paper is all you need to know about his personal opinion of it.

@grproteus Год назад

black holes "energetic vacuum which is coupled to the expansion of the universe" certainly beats the "negative pressure" explanation from that old episode on dark energy. I watched that episode five times and did not understand a thing, while I normally get the ideas and the math on first viewing.

@kylelochlann5053 Год назад

The DE equation of state is the same either way.

@MnJiman Год назад

Thank you for making a video on this. I have talked about this subject a few times, so its nice to see it being covered.

@punchkitten874 Год назад

You should check out the video he suggested, Dr. Becky is just the best when it comes to black holes, and she gives them an even fairer review than Matt

@drndn Год назад

Thank you very much for doing the "What If Black Holes ARE Dark Energy?" video, this was something I had explicitly requested on the Discord back when that idea was published.

@georgionw6554 Год назад

The thing that amazes me is that there is a answer to all our questions we have about the universe.

@dontactlikeUdonkno Год назад

Could black holes manifest as dark energy by pulling spacetime inwards? Pulling spacetime inwards towards centers of mass could have a similar effect (or similar appearance) to spreading the voids outward... stretching spacetime out in the center, rather than the empty/void space having negative density. Love the channel!

@tommarti-hl7ur Год назад

Just wrote this comment myself!

@dannydewario1550 Год назад

That's a neat idea for sure. But to me (a complete layperson on this stuff) that sounds like the empty space between galaxies is homogenous and unchanging, which would imply the amount of redshift of light from far away galaxies shouldn't be dependent on the distance it travels across space. In other words, galaxies far away from us (and of similar size) would have roughly equal redshifting no matter the distance - because only the space close to galaxies would cause redshifting. And as for larger galaxies with stronger black holes (which results in stronger pulling of spacetime), we would expect to see more redshifting for those larger galaxies. But again, I'm not an expert by a long shot and might be missing something.

@tommarti-hl7ur Год назад

@@dannydewario1550 if there is more distance to an object, then there more area being stretched by black holes between here and there. If every black hole is pulling space in (causing the light traveling through it to stretch) and there are more black holes stretching space between a more distant object than a nearer object, the redshift would correlate with distance.

@jusore Год назад

@ahpstudiostamil 11 месяцев назад

@petedevriese Год назад

If ER=EPR, could that provide a mechanism for cosmological coupling to work and provide a solution to the even distribution? As in, all supermassive black holes are connected to each other via wormholes, which provides a way of ‘sharing information’ on large scales and smoothing out the distribution.

@SvetoslavStoqnov Год назад

Shhh don't say it. It's a conspiracy. Wormholes are impossible to be use. Universe is to dangerous to travel. We all need to stay at home and wait for the next pandemic to kill us all.

@ThompPL1 Год назад

15:14 . . . Excluding Zero CC @ 99.98% : " So you're telling me there's a CHANCE . . . . Yeeeaahh ! " 🤣

@veryroomy 4 месяца назад

I hope this guy is remembered next to educators the likes of Bill Nye and Carl Sagan

@gabrielbrunheira Год назад

Regarding the reformulation of the Friedman equations they presented to accomodate the non-local influence of black holes, I wondered whether it could indicate a way to link this whole thing (gravity and stuff) to quantum mechanics, which is indeed non-local

@jonasandersson7078 Год назад

Wondering the same thing, if Susskinds “ER=EPR” (entanglement & gravity) relation could somehow be connected.

@ThePowerLover Год назад

GR is also "non-local", the thing is, we're limited by not being "pure energy", just look at the frame of reference of a photon (basically everything everywhere with "no time nor space").

@jusore Год назад

I often envision black holes tugging at the fabric of spacetime and spacetime like auxetic quantum foam, and black holes as factories of spacetime, turning matter into virtual quarks, because stars are said to fuse simple to more complex atoms, and denser stars are made of simpler elements, like neutron stars, it makes some sense to me that black holes make quarks stop being particles and go to be virtual particles. And gravitational waves, and matter that is converted into gravitational energy, contributing to the expansion of the universe. Look up a video titled "Auxetic Foam Research at HPMI" to see what an auxetic foam sample looks like. If the connection of black holes with dark energy is verified, the warp drive would have to be revised. Dark energy is said to be basically antigravity. It's something important for interstellar travel in reasonable time.

@JeovaneML Год назад

Just a thought: this kind of widespread interference “at a distance” may be related to quantum entanglement

@LuciFeric137 Год назад

Excellent as always. Fascinating topic.

@StretchOnYT Год назад

Gosh, this guy is by far my favorite show host for PBS ST

@twotheabyss5966 Год назад

Ive been watching these vids for a while now, i appreciate Matts breakdown into simple terms on the subjects even if sometimes i dont fully understand them

@drxyd Год назад

Wouldn't the rate of expansion then depend on the local density of black holes? Then some regions of the universe will expand faster/slower than others.

@youtubesucks1885 Год назад

On the largest scale matter as well as black holes should be equally distributed.

@jssomewhere6740 Год назад

That was my exact question. That changes the shape of the universe making the visible horizon different in every direction. Meaning no more Hubble constant.

@empireempire3545 Год назад

Not necessarily. Depends on the underlying physical mechanism by which the black holes convert mass/energy into space. If it's something like water pouring into a bathtub, then well, the water level rises uniformly even though the source is localized. This analogy is stronger than one might think - fluid dynamics equations are suspiciously similar to GR, both of which treat the subject matter as a continuous medium - even though we KNOW that water is NOT continuous medium, it's made of particles. Or better yet, imagine a tiny stream of water falling onto a kitchen table, slowly growing a pool.

@jssomewhere6740 Год назад

@@empireempire3545 Fair enough I didn't read the paper so I'm a bit unqualified to even ask a question. Yet this is the second video on this subject I've seen in as many days. I would love to explain dark energy this way, but it just seems way too hiding in plain sight to explain such a confusing and complex subject. So I guess I'm looking for that steel toed boot to kick it in the head. Thanks for your explanation it does make sense considering what is expanding is all part of the same single fabric.

@hankscorpio42069 Год назад

@@empireempire3545 I know that this is all conjecture but I like to imagine that space is an emergent property of mass / energy and that as it expands, it has to push against the surrounding spacetime, causing it to compress, causing what we call gravity. This expanding space still has to go somewhere and that's we observe at larger scales, i.e. cosmic inflation. What makes black holes unique is that the space is expanding faster than light can travel across it and any light that enters is basically red-shifted into oblivion.

@Eris123451 Год назад

That innocent sounding phrase, "That may one day be detectable," pretty much kills of it. Nonetheless welcome a change from the more SF oriented episodes that we've had recently.

@BobOgden1 Год назад

11:50 Spooky action at a distance? You're making the baby Einstein cry

@saraswati_6171 Год назад

I’ve thought like this for a long time, I m glad to see that theoretical physicists have at least considered all this. It may be wrong but I’m glad curiosity allows all possibilities to smash up against evidence.

@chadbailey3623 Год назад

I have speculated for years that dark energy is just another perception of black holes consuming space itself. If all black holes consume space, they cause a stretching of the spacetime between them and would be responsible for the primary red shift of measured galactic movements.

@YoutubeHandlesSuckBalls Год назад

If you consider the 'rubber sheet' analogy, then it would make sense that if you have points on that sheet that are pulling in the sheet, then the points would increase in mass due to the 'sheet' they absorb and that the 'sheet' in-between would become stretched and give the impression of expansion. Over time, as the points increase in mass, they pull in more sheet, giving the impression that the expansion is happening faster. To someone living on the sheet, the difference between expansion and sheet removal would be very difficult to distinguish. And of course, if the sheet is being pulled in at a constant rate, it would also explain the rotational velocity discrepancy in galaxies, thus explaining dark matter.

@petpaltea Год назад

Interesting and creative analogy! But, the black holes are not the only ones that are consuming the fabric of space-time, so to speak, also ordinalry mass object, like planets, stars, etc., are doing the same thing, just that the intensity or "speed" is order of magnitude lesser that of the black hole objects.

@jusore Год назад

@ahpstudiostamil 11 месяцев назад

@aR3mYs Год назад

that PC-to-mind analogy is pure diamond

@mrglobemcglobeglobe8318 Год назад

Great episode - love hearing you comment on other people's papers.

@berman00 Год назад

If dark matter is made of stuff, suppose it is an undiscovered particle for instance, is it possible for a black hole to absorb it into the event horizon? Would that change the mass of the black hole? Would it grow? Could this effect explain the very large rate at which supermassive black holes expand?

@NullHand Год назад

The only thing we know about dark matter is that it interacts gravitationally. Anything that does so becomes part of the black hole once it crosses the event horizon, and adds its mass/energy to it. There has been an argument that since dark matter doesn’t seem to participate in electromagnetism, it would have a hard time accreting efficiently, since unlike ordinary matter, it cannot loose velocity and any orbital angular momentum by blazing it away quasar like in an accretion disk.

@berman00 Год назад

@@NullHand yeah, that makes sense. I wonder if it would be possible to measure how much dark matter falls into a black hole and if that could tell us something about it. That seems a little out there though.

@ahpstudiostamil 11 месяцев назад

@skywalker541 Год назад

Always nice to see Soviet scientists given the credit they deserve!

@jengleheimerschmitt7941 Год назад

We couldnt have done it without Tsolikovsky

@hosh1313 Год назад

I love how we have dismissed the Aether but are now on the lookout for dark matter and dark energy! 🙃

@borisborcic Год назад

Thank you for this beautiful summary of the background. I find some analogy between this idea of equating DE to SMBHs, and OTOH a quip I came up with a dozen years back, in the form of the bold assertion that _Dark energy is ambient pollution from alien warp drives!_ -- with diverse motivations ranging from the humorous take on Fermi's Paradox; through an objection made to a subliminal perception (likely to be widely shared) that the focus on uncovering some Earth 2.0 that's expected of exoplanet research, was premised on a secret project to escape by relocating there (rather than address) a self-inflicted destiny of runaway greenhouse effect attributable in good part to vehicular emissions; to a more direct if vague analogy between _accelerating_ expansion and _runaway_ greenhouse effect; and, finally; to alluding to the idea that _the negative gravity (and negative self-gravity!?!) of the massive amounts of negative mass-energy postulated to enable FTL Alcubierre drives, leads to expect that in case of a leak or loss of confinement, the negative mass-energy would in fact race to mimic the uniform distribution and influence currently attributed to dark energy._

@borisborcic Год назад

I'd concede however that the satire directed by this quip at the expectation of our relocation to some Earth 2.0, is at risk from Poe's Law. A picture emerges of a Universe polluted by the failures multiplied over eons, of desperate attempts of planetary civilizations to save themselves using unstable approximations to an Alcubierre drive...

@jusore Год назад

@Rhuind Год назад

Best show on you tube for years straight. Keep it up Matt!

@mattjackson9859 Год назад

My thought is that black holes don't contain an actual physical singularity, just a virtual one infinitely far into future. Due to the colossal time dilation it takes literally forever for the singularity to form, by which time the BH will have already undergone Hawking evaporation. Has this been considered?

@SebastianLopez-nh1rr Год назад

That's interesting, no idea what the implications would be, or if it's testable at all.

@kylelochlann5053 Год назад

No, it's not considered as your idea is inconsistent with relativity.

@hellfire66683 Год назад

It's a chicken and the egg kind of thing.

@oskarskalski2982 Год назад

Yes this scenario is considered in loop quantum gravity. "Loosely speaking, the full phenomenon is analogous to the bouncing of a ball. A ball falls to the ground, bounces, and then moves up. The upward motion after the bounce is the time-reversed version of the falling ball. Similarly, a black hole “bounces” and emerges as its time-reversed version-a white hole. Collapsing matter does not disappear at the center: it bounces up through the white hole. Energy and information that fell into the black hole emerge from the white hole. The configuration where the compression is maximal, which separates the black hole from the white hole, is called a “Planck star.” Because of the huge time distortion allowed by relativity, the time for the process to happen can be short (microseconds) when measured from inside the hole but long (billions of years) when measured from the outside. Black holes might be bouncing stars seen in extreme slow motion"

@ericgraham8150 Год назад

You should do a refresher into the archives of our own favorite space time channel! But just for the sake of your question, pretty much every respected astro/physiciscist / researchers do *not* believe that the singularity in a blackhole is a real, it's widely recognized that the singularity comes about because our current laws of physics are missing some key component(s) needed to properly describe blackholes. Think of it like a computer program that has a bug caused by faulty code, which makes it divide by zero, and so it spits out an answer that is impossible to reconcile and Call of Duty crashes. The singularity in blackholes just suggests our math is wrong, and I don't know of any non crackpot scientist who believes otherwise!

@Sad_King_Billy Год назад

Love when my favorite space channel shouts out my other favorite space channel!

@ultimaIXultima Год назад

haha, Dr Becky came up - love it! that said, when a PBS spacetime vid hits my notifications, i drop everything. you guys make some of the best content on the internet. meetings at work? launch the vid and mute my phone. someone asks me a direct question? "oh, i was fixing something, somewhere (i was listening to conjectures about the universe)... can you repeat the question?" Please, never change. haha!

@MrJest2 Год назад

Since "dark energy" is merely a placeholder, it - of course - remains to be seen. But I think there are too many "known unknowns" (to say nothing of "unknown unknowns") to dismiss this out of hand. As always in science, more testing and exploration and creation of detection techniques are required. Science is the process of generating *questions* . The occasional _answer_ popping out is an anomaly; not the goal.

@philiphumphrey1548 Год назад

Great video. With dark energy, I suspect it's a case of the theoreticians getting way ahead of the experimental data available. Or as Asimov would put it "Insufficient data for a meaningful answer".

@ahpstudiostamil 11 месяцев назад

@zacharywong483 Год назад

Fantastic video, Space Time team!

@namanpujari1964 Год назад

I love that Matt wears a T-shirt with the quote "The heat death of the universe is coming". That was another elegant and speculative idea that later turned out to be wrong and was endrosed by physicists like Stephen Hawking. I hope this idea carries some weight. I love this idea, maybe I will choose something related to black holes and the growth of galaxy clusters for my master's thesis.

@redchris7352 Год назад

Wait, what do you mean? I thought heat death theory is pretty reasonable, though...

@karonuva Год назад

When was the heat death of the universe proved wrong, exactly?

@t.c.bramblett617 Год назад

My intuition is that something about dark energy and the massive structure of the universe has something in common with a foam, where the empty spaces are expanding as the "seams" are contracting. But this is totally unbased in anything like expertise or math, just a feeling... and those are best not trusted, but instead should be tested tentatively. It is really hard to get a grasp on these things (like black holes) that break our reality models, and to put them into a larger picture without distortion. Thank you so much for these constantly enlightening videos!

@EnglishMike Год назад

I believe the prevailing thought is even simpler -- that space itself contains energy which contributes to the expansion of the universe, and thus the more space there is, the greater the energy and thus the greater rate of expansion. Adding seams would seem (sorry) to complicate things unnecessarily, but then I know as much as you do about all this -- i.e. almost nothing!

@jusore Год назад

It would be nice if it were true. I often envision black holes tugging at the fabric of spacetime and spacetime like auxetic quantum foam. Look up a video titled "Auxetic Foam Research at HPMI" to see what an auxetic foam sample looks like. If the connection of black holes with dark energy is verified, the warp drive would have to be revised. Dark energy is said to be basically antigravity.

@kiraPh1234k Год назад

I've said this years ago on this channel, but I think dark energy is essentially just the part of gravity we haven't figured out yet. And if we can get the shape of black holes down (you know, get rid of the singularity in the math) then we may immediately get an answer as to what's causing dark energy. While this study has me far from convinced of their conclusions, I do like that they used that very idea to get here and I hope more do it.

@jusore Год назад

@UnionYes1021 Год назад

Thank you for another informative and interesting episode!

@jaranth Год назад

Super fascinating, I'd never heard of this!

@pscwplb Год назад

If black holes gain size coupled to cosmic expansion, does this mean holes of a certain minimum mass cannot reduce in mass due to evaporation?

@juliasophical Год назад

That's true even if they aren't tied to cosmic expansion. Hawking radiation is black body radiation, and until the temperature of the CMB drops below the temperature of a black hole, the hole grows rather than shrinks (heat flows towards cold, not the other way around -- or, put another way, the black hole absorbs more from the CMB than it emits). So in the present universe, black holes bigger than 133 micrometers (about the mass of the Moon) cannot evaporate.

@qbtc Год назад

Even without this idea, the time it takes for ordinary black holes to evaporate is 10^100 years. The universe is only 1.37 x 10^10 years. Essentially, only microscopic black holes can evaporate on any practical time frame.

@anshgawai Год назад

Here faster than the rock orbiting near a supermassive blackhole

@nevertrusasmurf Год назад

Timing is everything

@TForce268 Год назад

From my perspective you never actually got here…

@7Alberto7 Год назад

I crave spaghetti now...

@Enjoymentboy Год назад

Once, when camping with friends and being FAR too high, we got into a conversation about this sort of thing. Somehow we got onto the line of discussion where the act of matter and energy being compressed by a black hole could directly relate to a corresponding expansion of space/time and that this might result in a point where all matter and energy had been "eaten" and nothing but black holes were left in the universe. At that point they'd begin to slowly evaporate into Hawking Radiation stopping the release/creation of dark energy and this would result in the expansion of the universe stopping and reverse, beginning the "big crunch". As I noted above we were all very, VERY high at the time.

@jusore Год назад

Exactly, so that's the quantum foam limit in its elastic tension. I often envision black holes tugging at the fabric of spacetime and spacetime like auxetic quantum foam, and black holes as factories of spacetime, turning matter into virtual quarks, because stars are said to fuse simple to more complex atoms, and denser stars are made of simpler elements, like neutron stars, it makes some sense to me that black holes make quarks stop being particles and go to be virtual particles. And gravitational waves, and matter that is converted into gravitational energy, contributing to the expansion of the universe. Look up a video titled "Auxetic Foam Research at HPMI" to see what an auxetic foam sample looks like. If the connection of black holes with dark energy is verified, the warp drive would have to be revised. Dark energy is said to be basically antigravity. It's something important for interstellar travel in reasonable time.

@LuisAldamiz Год назад

Gliner wears a beret = Gliner must be right... At least on first sight, sounds solid to me. Paraphrasing a saying from my country: "wear a beret and hitchhitke across the galaxy".

@ShihammeDarc Год назад

7:09 afaik all galaxies don't have SMBHs

@Hailfire08 Год назад

True, I think M33 (Triangulum galaxy) is missing one

@thehappypittie Год назад

So if Dark Energy does turn out to be created by black holes would that mean its just a measure of how much spacetime has been stretched since the beginning of the universe by massive objects?

@jusore Год назад

Maybe. I often envision black holes tugging at the fabric of spacetime and spacetime like auxetic quantum foam. Look up a video titled "Auxetic Foam Research at HPMI" to see what an auxetic foam sample looks like. If the connection of black holes with dark energy is verified, the warp drive would have to be revised. Dark energy is said to be basically antigravity. It's something important for interstellar travel in reasonable time.

@fraliexb Год назад

I'm hyped you're doing this video. I'm interested in this theory.

@Rationalific Год назад

Very well put, and I also like the skepticism!

@blokin5039 10 месяцев назад

Why???

@markrix Год назад

Some people might laugh at this question but what if dark matter is actually the matter of the black hole has already ingested???

@basaliskjones1705 Год назад

Could the coupling be another proof of the non-locality in quantum mechanics? I saw a paper talking about energy transfer through entangled particles using an ibm quantum computer, could this be a related phenomena since the singularity is technically a quantum object?

@Laff700 Год назад

If true it might be, but it's most certainly false. Dark energy can be thought of as a term being added to the stress-energy tensor such that there's a distribution of negative energy particles. In order for black holes to produce this dark energy effect on the universe, they'd probably have to become repulsive. Somewhat related though, there's a theory that entangled particles are connected via wormholes. These wormholes would also require a negative energy density to be stabilized. Maybe the wormholes contain dark energy? Maybe entangled particles flying apart might have an effect on the quantity of dark energy? The experiment you're referring to required negative energy densities after all.

@jusore Год назад

@@Laff700 I often envision black holes tugging at the fabric of spacetime and spacetime like auxetic quantum foam, and black holes as factories of spacetime, turning matter into virtual quarks, because stars are said to fuse simple to more complex atoms, and denser stars are made of simpler elements, like neutron stars, it makes some sense to me that black holes make quarks stop being particles and go to be virtual particles. And gravitational waves, and matter that is converted into gravitational energy, contributing to the expansion of the universe. Look up a video titled "Auxetic Foam Research at HPMI" to see what an auxetic foam sample looks like. If the connection of black holes with dark energy is verified, the warp drive would have to be revised. Dark energy is said to be basically antigravity. It's something important for interstellar travel in reasonable time.

@peterkelley6344 Год назад

Congratulations on acknowledging Dr. Becky. Wish i could listen to both of you tear apart an astronomy topic sometime.

@andrewvellos9735 Год назад

Been waiting for this one!

@danielrhouck Год назад

That video intro is how I felt about ER=EPR for a long time; it took a while for me to realize it was a respected conjecture instead of “here are two things we donʼt understand about things being connected at a distance; letʼs try to shove them together”.

@freehat2722 Год назад

I listened to Dr Becky and she misses some basic concepts. I'll pass on that. I'm very glad you covered this. Sometimes the fringe is correct and deserve their day in court.

@EnglishMike Год назад

Fringe ideas are published by mainstream scientists all the time, they just don't typically get much publicity. But it's important to distinguish between fringe ideas backed up by doing science, as in this case, and the type of nonsense you see people claiming in RU-vid comment threads, like the Electric Universe, which isn't backed up by science at all.

@freehat2722 Год назад

@@EnglishMike Preaching to the choir. I have a personal issue with the way I learn physics. It's via visualization not math directly. I can grasp concepts easily, but don't have the math to back my ideas up. I've been trying to communicate but without the PHD and proper channels open I am hopelessly lost. Any recommendations are welcome. Find a technical cosmological physicist and waste their time essentially. I've been learning for decades. I have a small chance were I might be able to make a difference.

@Xabraxus Год назад

Hit the nail on the head at 0:00, I woke up just the other day and put some powdered creamer on to my coffee and observed the floating mounds of creamer create a swirl within the coffee as it dissolved on top of the meniscus and sank into the coffee, that gave me the idea that our universe might just be sitting on top of a higher dimensional 'meniscus' and the gravity that sinks into it causes our galaxies to swirl in ways we can't explain without dark matter.

@michaelniederer2831 Год назад

Well done. Nice nod to Dr. Becky. Thanks.

@djayjp Год назад

QUESTION: does that mean the energy of the vacuum is actually a false vacuum since that experiment that showed you can teleport energy using entanglement led to a lower energy value from the origin as a result of the transfer?

@AdamBoozer 10 месяцев назад

Not sure, but there is a distance limit on quantum entanglement we discovered recently.

@djayjp 10 месяцев назад

@@AdamBoozer Interesting. Source?

@momo7gato Год назад

I feel that we are in the need of realizing another type of physics. Something analogous with how quantum physics works in the subatomic realm but this physics would be on the scale of universes and their interactions. These Space Time videos always have my head swimming with excitement of us comprehending the secrets of our universe. Great job!

@bipolarminddroppings Год назад

The problem with your idea is that we were FORCED to come up with QM by reality itself. There is zero evidence for other universes, only speculation based upon our current models of the universe, all of which we know aren't complete. You can't create a new branch of physics to study something we have no evidence, let alone a way to actually get any data about. There is no experiment you can do in this universe that can tell you anything about whether other universes exist or what properties they might have. In other words, it wouldn't be science and no one worthwhile would waste any time on it.

@shawnholbrook7278 Год назад

I like watching your shows. I also like Dr. Becky and lots of PBS. Thank you all!

@harshwardhan8259 Год назад

Great material to fall Asleep

@thomaskancyan2485 Год назад

We often see black holes depicted in 2D models as the singularity pulling down spacetime. Are there any good videos that discuss how black holes actually look in 3D? Like is the BH actually flat and the horizon could be on plane with our POV / seen at different angles? Or would it look more like an orb? Like if a BH is facing us where we are observing directly above the event horizon in the 2D model, how far does the singularity go down? Wouldn't it run into other things near it?

@jusore Год назад

You can see the black hole in 3D in the movie Interstellar. There is a gif of how spacetime curves towards the inside of an object's center of gravity. You can imagine gravity as the concave curvature of a contracting vortex and dark energy as the convex curvature between galaxies.