Could The Universe Be Inside A Black Hole?
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- เผยแพร่เมื่อ 29 พ.ค. 2024
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What is inside a black hole? Inevitable crushing doom? Gateways to other universes? Weird, multidimensional libraries? If you’ve ever wanted to know then you might be in luck - Some physicists have argued that you’re inside one right now.
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Oh goodie, some existential dread before I go to bed!
You're welcome!
sweet dreams
Hey that rhymes! 😀
Bars 🔥
😂
The idea that our whole universe could exist inside a black hole is pretty amazing. It really reminds me of the meme about how life is formed from all of the elements created from a supernova, and ends with, “If you explode something hard enough, sometimes dust wakes up and thinks about itself”
i NEED THAT MEME RN
if you leave some organic matter in the goldilock zone of a star it'll start thinking about itself
eventually...
Dust didn't wake up. Dust compressed into a ball with goo and the goo woke up.
Are whole " visible " universe.. the rest is INFINITE!
So wouldn't this be a new way to think of multi-universal theory? Because it would mean, at least in theory, that there's potentially a greater/outer universe that spawns black holes that contain nested universes within it. Or it would mean we exist in a fractal reality where instead of turtles it's black holes all the way up and down.
I think it maybe s hyperlink universe series like Internet rather than a nested or fractal universe series.
@@simoncline255fractal because potentially it’s infinite
I just commented something almost identical on another video. That’s exactly what I think in my very limited capacity as a scientist lolol
@@Sporeboy87 no fractal because it repeats itself at high levels of resolution. Like a square inside a square inside a square. As the resolution increases or you go "deeper" there are more iterations of the thing at different scales.
The thing about that though, is that the surface area of a fractal is infinite if you iterate it an infinite amount of times.
"Its turtles all the way down" was exactly my thought as this video wrapped up, lol
Thinking about our existence is crazy as it is .. thinking about the universe’s existence is just next level mind blowing craziness
We are the universe. So we literally are the universe being conscious of itself.
@@r.a.l.p.h Or so you one of those people, everyone is just atoms and molecules huh? So if someone takes a life it means nothing because they're just rearranging the atoms right?
@@ikhlashasib8256 nobody said that lol
@@ikhlashasib8256 does life really need a meaning?
@@JVCA44 Lol, are you really this illogical mate? Every thing in your body has a purpose, everything in the world has a purpose, everything in the universe has a purpose but you? No, you have none and life and everything that exist is just meaningless 🤦♂, bro, well why do anything? why go to work, why do good? why go to school? why do anything if it's all meaningless?
To me, the most incredible thing about this is that people who study this subject can walk around freely without their brains exploding.
What a confusing subject.
It just feels like standing in a mirror surrounded by mirrors
Not really. It all makes sense if you truly understand geodesics, because that is the basis of all the theories Matt is referencing . I will admit it requires a good imagination tho
Thats because there is a thin lining of coffee between their brains and their skull, which cushions the impact of explosive thoughts, which keeps their cranium intact.
Their heads explode on this side of the black hole event horizon then reforms on the white hole side.
Very few know that Einstein was pacifist and his boss in Germany was a creator of the first chemical weapon. Einstein backed Schrodinger's work on event horizon only to get him out from WWI trenches where he wrote his equation (though Einstein told himself that it was just math model having no reality). Recently Vivian Robinson, co-inventor of electronic microscopes, pin pointed up to the line Schrodinger's math mistake. If you like such stuff read more in Bob Lazar Cutting Edge.
If a black hole is pulling in spacetime, then from the inside, wouldn't it appear to be gaining spacetime, and therefore appear to be expanding?
No.a black holes is in the fabric of spacetime, quite strange object that man will never comprehend,never would know what's goes on insides a black
I love how both of the first replies to this comment are like “NO.”
It’s a great question. It’s entirely possible.
It could be. If there exist pockets inside of event horizons; and the variables of size, intensity of collapse/expansion.... we may very well be the current "too substantive" to be squashed out of existence instantly.
In other words, gravity is the illusion that mass bends time, when it could just be: we are inside of an event horizon that is failing miserably (currently) to squash us out of existence, because we haven't dissipated enough yet
It's about time, so yes!
@@Bikewithlove But you're the second, so there's only one.
Black holes and the entire universe and anything and everything about these subjects are actually some of my very very very extreme favorite subjects of all time.
Oh that's fascinating.
I like this idea because if true, it also answers the multiverse question. There are lots of black holes and therefore lots of little universes absolutely everywhere. And they could contain their own infinity of black holes. It all makes sense.
But then there is no end to it ? It's just black holes inside black holes inside black holes ?
It doesn't really make sense
@@somethinsomethin7216
I know this is a terrible argument/response but if IF its true...the truth doesnt care if you dont understand it/if it doesnt make sense to you...
@@Bella-vt7ol you are right anything is possible in the realm of probability. But what is reasonable?
It is insane, to think that we are very very very lucky, to have a universe that caters to life existing, but not only that, but life with consciousness. From a bottom-up perspective it is insane how we got here from natural means, from simplicity all the way to complexity of consciousness.
Or the other hypothesis is there already is an eternal transcendent consciousness that created a universe with specific conditions to host life with consciousness. So more of a top-bottom approach
@@somethinsomethin7216It does and it doesn't. I think the hardest part to get your head around is that space and time might not be limited in scale in the way we understand and observe it. That a universe might be able to contain infinite universes within itself equally if not larger than itself. We think of space and time in it's physically observable state from our own perspective of 4 dimensional space and time.
So, this video discusses the possibility of our universe being inside a black hole. I've also seen something about our universe possibly being on a 3D event horizon of a black hole in a 4D universe. I don't know if there's enough there for an episode, but it would be cool for Matt to discuss it.
Exactly, everyone keeps suggesting there is a 1:1 correspondence here between event horizons and cosmological ones, but the issue of dimensionality is not discussed.
I think they’ve already made one. Holographic universe I think.
At this point, there's kind of no question that there are 4 or more spacial dimensions. The question is why we can't perceive more than 3. But what is really cool is that, if someone or something was able to live outside our 3D space, they'd likely see through time, i.e. see "past"/"present"/"future". Of course that brings up whether things are pre-determined or if we can influence the future, and how much we can influence the future, but it's a really cool thought experiment.
@@Lord_and_Savior_Gay_Jesus We don't know that it started from a single point. It could be infinite in size and was simply much denser than it is now.
@@gab.lab.martins Is there any evidence that extra spacial dimensions exist other than being an artifact of mathematics?
Just wanted to say, I'm 70, and started speculating a decade ago the analogies between the collapsing space inside a black hole, and the steadily expanding space-time universe in which we live. I've not known who or how to ask, but I'm so happy to hear it articulated. Now I can die in peace, knowing that speculation is in good hands. Thank You Matt.
It’s amazing how so many of us stumble upon theories that are later developed by people who actually study the science of that subject. I posit there’s a large number of average people out there that are closer to reality with their theories than they realize.
@@d.j.wattson4804 true
Time is just a beginning greater things still too come my friend
lmao
You are awesome Bruce :)
I’ve always wondered about this. Mostly because of the theories behind the Big Bang. I always thought that maybe that’s what happens inside a black hole.
I wonder if black holes are creation points of new universes. As far as we know big bang came to be from extremely hot and dense point, so since the center of a black hole is also so dense that it’s volume is almost zero, maybe black holes just gather matter to the point it reaches critical mass and expands to a new universe
But they don't expand , and it implies to me that there is no multiverse all the "universes" exist together in the same realm and rules
DAMN
@@devdecker7812They do expand. Super massive blackholes.
@@devdecker7812take that L
Fun fact, black holes get less dense without limit the bigger they are, because they have a radius r = (2G/c^2) * M directly proportional to their mass. For example, a black hole with the mass of our universe would have a Schwarzschild radius about the size of our universe and a density about the density of our universe.
@@promogames_ Is this supposed to be an insult? On this channel?
@@assainisateur we’re all nerds in our own ways.
The universe is black so…
@@promogames_ BE NICE TO PEOPLE
did you mean "observable at this time period universe"?
This is exactly the way I imagine our Multi-verse looks like. The fractal structure of never-ending hard to put in words beatiful infinite reality we're living in.
When you use the term "the universe" what exactly do you mean or what exactly are you trying to convey when you use that term?
Your problem and it is a very real problem, is conceptual and the fact that you cannot see that demonstrates what your problem is
@@vhawk1951kl I said "multi-verse" or "reality", I didn't say universe. For me "a universe" is just another iteration of a never-ending process. Can I describe that process (fractal multi-verse)? I could describe how I imagine it, but not in the youtube comments section. Can I "demonstrate it?" No. And most likely no one will. Ever. Because it's physically impossible to experiment that.
@@tudordima3468 exactly, that's how I think it too. You can somehow and I repeat somehow imagine it inside your brain. But, explaining it with words is near impossible.
Too bad there is not a shred of proof. You are a man of great faith to believe in an infinite amount of something. I have seen no evidence of any physical object being infinite.
@@harrkev is space even physical tho? It's space, coz it is space.
Wonderful to see we haven't run out of theories yet.
This idea just makes sense to me, I've always had a gut feeling that reality is a fractal. And being inside a black hole makes sense
Tell Rocco Siffredi about it.
i mean, it would certainly explain why space is "black" lol
I like black holes. The ones in space too.
I'm really glad you mention the infinite nesting at the end! It was bugging me the whole time. If the black hole contains black holes, well, then unless the one we are in is unique and the ones inside it are different, it means universes are fractal.
which is actually one of the things that really speaks for this idear. fractals show up in math all the time, and all over the place in nature. fractals is the most common thing in existence.
But my min is breaking just trying to question what would be weirdest, a universe that has a clear start/end or a never ending one.
but Infinity is for me way more understandable than true nothing. tho also am pretty sure true nothing and Infinity is the same thing.
Often people against science say: "but the universe could not come form nothing" and it kind of baffles me that so many people are cocky enough to believe they have any clue what true nothing can and cant do.
People might think they have a grasp of what "having nothing" means but no, no one has ever had nothing, theres always something. to even make something that gets close to what true nothing is has yet to be achieved.
We have invited 0 but honestly 0 is such a bug in math, like the fact we dont know how to calculate 1 divide by 0 seems to me to point at the fact that 0 is not a real number just like infinity is not a real number but a concept.
@@MouseGoat
Really enjoyed reading your comment, I hope i can add some more fuel to your fire.
So before I get into it, vsauce has a video on infinity that's really good. Talks about infinite sets. Secondly, most scientists would agree this universe has a clear start but no clear end.
Now, to get right into your comment. Our understanding of the big bang goes back to fractions of a second after the universe began, but not all the way. There is this little period at the very beginning that we can't really account for. Now, our equations tell us that this beginning was infinitely small and dense, like the singularity at the centre of a black hole. This doesn't mean it was - usually divide by zero stuff or infinities popping up mean the maths is no good, rather than a literal description of reality. Inflation is the part of the big bang that people like roger penrose take issue with. There isn't really any evidence to suggest we came from nothing, it's just a natural assumption that if we came from something very, very small, then that must have come from something smaller and so on til you reach 0. But, as zenos put forward in ancient grecian times, you can never slice down to actual 0!
yes. although it may be more meaningful to say that fractals exhibit many of the properties that tend to be present in sufficiently complex and interrelated systems, such as our universe. I'm of 2 minds, as fractals are mathematical and the universe physical, it's difficult to say which is a category of the other.
those of us who would like to emphatically thumbs up this video several times, and who take infinity seriously, should form a social group of some sort. I would very much like to have many conversations on such things.
@@MouseGoat yah nothing doesn't exist because by definition it's nothing. once you have an idea of something, like the idea of nothing, you have something. I think this causally and statistically means that there should be either :
A: an infinite collection of all possible combinations of all possible things, which would inevitably stretch beyond our current definition of what is possible or
B: an arbitrary (and statistically speaking very large in relation to our observations) set of possible things, that we should never assume terminates just beyond our understanding.
these things may be functionally indistinguishable from the perspective of everything in existence.
thoughts?
This idea just makes me picture the ending of the first Men in Black movie where a (our?) galaxy was contained inside a marble in a game being played by larger beings.
I think about this kinda thing all the time. Like what if our entire universe and existence is just the equivalent of an atom in an infinitely larger universe which we'd never be able to see because the scaling is so great we wouldnt be able to decipher or even comprehend its existence
So glad I'm not the only one with these crazy thoughts either!
My version is that what we call our universe is just one cell in a body in an infinitely large (from our perspective) universe. Likewise, one atom in our existence is an entire infinitely small universe to someone else... and so forth, in both directions (larger and smaller).
Is this what physicists mean when they talk about other dimensions? 🤷🏼♀️
What if we're in only the most recent big bang? Just as galaxies crash into each other and black holes grow and swallow everything. What if two black holes grow so large and come together, boom,big bang. A cycle that repeats every 100 ish billion years give or take. Just a thought for when you can't sleep ... sorry.
; 》
@@mamoros56 I like to think a little darker, that the earth is a "damaged cell" and it's like humans will cause issues to the larger being if we spread out into the universe. Just shower thoughts
@@mamoros56 and we are cancer eating away at the cell and trying to spread to other planets and in time spread to other universes destroying every planet we move to by just simply living.
It would be super cool to go into an event horizon of a black hole and into a singularity and not die, but instead be transported into another universe. Maybe that's when we meet new life. Maybe advanced reptiles instead of advanced mammals. Or maybe Elder Gods from H. P. Lovecraft's Cthulhu mythos.
Lol that'd be sick
You would probably die, but your matter would make it through!
@@selvaa1592worth it
Wow, what an interesting episode! Thanks everyone who made this!
I think it's plausible, but then, when we've created micro black holes with the LHC, it's also plausible that inside that micro black hole existed a micro universe that experienced the big bang, infinite time, and the delusion of all existence, in what was a fraction of a second for us.
Have we actually created micro black holes? I didn’t think we had.
Good point 🙃
But there were no black holes created in Cern.
Micro black holes have never been created nor detected. Because they don't even exist
@@jerardogonzalez007 true, though Theories confirm them, there is yet no schwarzschild metric physically possible at this subatomic scales
Just reading these comments, I feel so humbled and appreciative of all our scientists and space enthusiasts. I have little knowledge beyond astronomy 101, so I basically have no idea what everyone is talking about…but I want to learn!
Well son soon you'll start getting hair in funny places , and you're gonna start thinking about girls 😆😆😆😆 then you'll realize all hoe's black , white whatever they're pretty much the same and you'll love em all .😆🤟🏼🤟🏼
Same
The hole thing is quite confusing....lol
@@underthetornado I think we are in a blackhole universe which is inside another blackhole universe inside another black hole universe inside another ....... And so on.
@@underthetornado XD
First time watching. I saw you on Star Talk and figured I'd check it out.
Now I need to add Space Time to my playlist. Great video!
i wish I could rewatch every episode from scratch now, you're in for such a treat! The earliest episodes are a bit rougher production but still brilliantly written
This has become my favorite space theory of all time, first because it would kinda make sense, and if proved true, it would answer so many questions while also opening the way to a whole new series of thoughts and discussion on what's out there, beyond our bounded universe.
if the universe were inside a black hole would we be able to detect matter (or energy) leaking out due to hawking radiation? what would the shrinking of the black hole look like from inside our universe that is in the black hole?
Accelerating inflation?
That's what I'd like to know. I'm assuming it would be energy leaving the system, so it would look like a negative energy with the daughter universe, and that could make the theory falsifiable. However, these video have taught me that I know nothing about physics!
Not like I have any real idea, but perhaps it is happening so slowly we have no way of detecting it.
It wouldn't be visible at all to us, since everything stops for infinity at the event horizon, from outside the event horizon. So we would never see anything
@@jogleby I think that the "inside a black hole" argument requires the "black hole = white hole" assumption he mentions at the end, in which case Hawking radiation is balanced by cosmic background radiation absorption.
So probably the answer is that for it to be possible that we're inside a black hole, then there is nothing to detect as total energy stays constant.
Cosmology seems like a path straight into madness, and I'm enjoying every second of it because I'm nowhere near smart enough to understand it all.
Taking the time and effort, and having a good tutor, can help us understand it.
At that point, after attaining better understanding, I think the surprising thing will be that it's *still* a straight path into madness.
Or a path to enlightenment. Your choice
@@useyourbrain6937 Maybe they're not so different, when seen by others from the outside :D
So, do I still have to go to work tomorrow?
nope!
be like Peter from Office Space
"Your videos always leave me in awe and eager to learn more about the mysteries of the universe. Thank you for fueling my curiosity.
"
Every since I was a child, I've been fascinated with the idea that all things are within other things. Sparked entirely from a visual comparison based on an extreme zoom in of a human eye, and an extreme zoom out of galactic images; such as nebula clouds. While universes within atoms seems rather outlandish, I do like the idea still. But I am continually fascinated with the comparisons between a blackhole singularity and the singularity at the beginning of our universe. Perhaps each blackhole is actually a child birthed from our universe, just as we were born as one. Each one experiencing their own form of natural selection in ways we could only speculate upon. Well, I at least like the idea of it.
Exactly
Only the biggest most powerful black hole in a single universe inevitably wins as the smaller ones are also absorbed.
Ok.....that just mind f**ked me lmao. Gonna have me thinking of that all day now 😆😂😅
are you talking about fractals in particular?
Do you not understand that the very term universes is an oxymoron?
It gives me chills that there are so many others that have had this same thought. Life is such an incredible experience!
It's just one of those things that when you think about it, it makes perfect sense, but there's no real way to prove it. It all fits together so nicely. Maybe all the matter absorbed by a black hole continues to build up and build up until its mass reaches a breaking point, then in a huge explosion the big bang occurs all at once, being released as a white hole.
@@menthols4625 which mean that every single black hole in the universe is a pathway to a completely different parallel universe. Jesus there's billions of them
We are many indeed, it isn't very backed, and it is just a theory of thoughts. After all, it is not something we can test, not anytime soon at least. Hopefully at some point humans may be able to bend physics to enable such testing. The saddest part is, we are extremely far from that point, so us who have been thinking about this, will never have our answer, sadly.
I mean such a theory if even remotely to factual, it could potentially answer also a significant number of questions regarding the "big bang" as well. Lot's of great stuff.
Deep down we know the truth.
Yeah I always thought this was the case, it's almost obvious to me... The problem is proving it...
12:15 “what’s on the outside”
The “multiverse” that everyone seems to think exists… Outside could be another version of us where outside of their universe is just another version of us again so on and so forth
A beautiful theory 🫶 presented by a very talented young man 🍀 Thank you for sharing your work with everyone ♾️
I’ve been watching you for years now. Honest criticism, you’ve become WAYYY better at talking to the camera in the last few years… love your videos now! Good job dude!!
this is not criticism. wtf lmfao
The chances of being inside a black hole is low, but never zero.
Just about the same odds as being attacked by a cow.
@@pixelkat1819 actually those odds are very high 😐
@@pixelkat1819 my dad got charged at by a cow (not a bull) when he was hiking in France. The cows horn sliced into his leg and had to get a huge amount of stitches on his upper thigh.
I'm pretty sure my first apartment qualified.
@@sirsherlock3550
Not necessarily true.
There are provably conditions that are unprovable yet true.
Mind blowing theory, Excellent explainations. Fascinating video.
I'm totally fine with this explanation. It gives me some sort of closure so I don't freak out every now and then :)
I often imagined that black holes ARE the "edge" of the universe. And the "space" outside the universe is a "place" of infinite mass and physics and the universe is just an empty bubble-ish shaped space with little chunks of mass that are floating around and sticking together and if enough come together they form enough mass to essentially poke a hole into the other "side". Creating a sort of door way or entrance back into the infinite space but the gravitational pull is so strong that it actually makes it harder for matter to truly fall into a black hole.
hmmm very interesting
nice
#metoo
I like you
Thank you, kind folks. 😁
Who does the audio engineering? I've always admired their work.
It's PBS, not some homebody youtuber...they have resources as good as any media operation in the world
@@davidparadis490 That a person gets paid for a job doesn't necessarily mean admiration for said job (if it is done well) isn't in order.
@@davidparadis490 god I hate homebodies
@@davidparadis490 An individual or group of individuals still have to mix the audio, and they still need the skill to do it well. It is fine to admire their work.
@@DemonKyle thanks, what strange reactions to my comment. Just because it's PBS doesn't mean there aren't humans doing the work. Wtf?
My Blackhole theory when I saw the title:
The Universe is ever expanding, if the universe was a blackhole, then the black hole would be constantly absorbing matter, which causes the universe to expand.
Thank you for speaking so clearly. Rarely can I watch a yotube video at 2.5x speed, but with you, I can.
I’m just a regular guy but I’ve always had strange ideas since I was a child. And as am a grown man now it strikes me that a lot of what I think about the universe without having any real knowledge is shared by many scientists and other people.
I guess that’s INSTINCT as we are part of this universe.
I truly do wonder if our universe is circular and spacetime simply wraps around to where you'd wind back up at these same spot traveling in any straight 1D direction OR..... Is the universe flat and has a folding edge or possibly carries on forever on a infinite plane... Guess the world will never know :/
Same here bro. 🤜🤛
Science-Watch-Suggesss - want some?
Your ideas don't occur in a vacuum and it's not surprising that many people will be led by observation to similar conclusions. It's not "instinct", it's pattern recognition. Now being able to argue your ideas logically, that's the next step and that's how science works.
That’s honestly very terrifying and beautiful at the same time. The amount of time we have been in a black hole could mean we live in a much bigger universe with possibly infinite time. I don’t know how people carrying on their lives with a puzzle like this.
It could even be like those Russian babushka dolls! Black holes inside of black holes inside of black holes!😂
You know something else: we probably existed and will exist infinite times if times is infinite. Existing here for the first and last time, a incredible small fraction of infinite, is just not realistic
@@dieterrosswag933 If you define "us" as life then you are probably correct. If you define it as separate individuals with memories and identities, I doubt it. We are matter and have a finite time.
@@kenshinsan12 yes. When we pass away any memory is gone... probably. But will be born again. Where, who, when...no one knows
@@dieterrosswag933if the universe is infinite, then why wouldn't consciousness be? You just relocate but retain your memory
This episode more than any other has blown my mind.
You have an image where the singularity of the white hole and the singularity of the black hole are paired with the event horizons going in opposite directions in time. However, if you pair the event horizons with the white hole singularity at the beginning and the black hole at the end, you have an expansion then contraction of a spiral universe.
That contraction eventually becing dense enough to cause a big band explosion and so the whole process begins again
Ur refreshing lol exactly... microcosmic\macrocosmic inversion... tesseracts; fold.
@@odalyssanchez7 its actually a constant... time makes you percieve that spatial dimension as linear.
@@odalyssanchez7 You mean Artie Shaw and Glenn Miller will return? (Big Band explosion...)
You cannot escape a black hole, just like you cannot escape our sponsor: raid shadow legends.
I can't be the only one who as a college physics student I thought that each singularity at the center of a black hole might start of a universe inside of it. It's such an obvious conclusion to come to. Very cool to see that idea getting some actual weight behind it in the scientific community. (dang, that was almost 20 years ago now.. I'm old af)
Same here by just doing some Google research on NASA websites etc
To me it would make sense that the Big bang is what happens when a black hole is formed or entered and the Big crush would be when we meet the singularity
'old af' and not doing much 'professional' physics at a guess...
@@hales6547 that and a thousand other random stories that have no proof... but I suppose monkey's typing forever will eventually write Shakespeare's complete works. Maybe you are right and you will find out at the end of time, more likely you need to do something useful now.
Same here.
It is definitely interesting, but what about matter and decay like he mentions? Are they just smaller universes or is string theory coming into play? If it wasn't for expansion and decay I would have thought that black holes will eventually all come together and become such a powerful entity so that it sucks everything back from the furthest reaches like in the cyclical universe shown in Futurama. I thought of that myself as well but didn't seem to work. The theories in this episode are amazing but still need explanation.
Great presentation Matt.
one of the most satisfying “spacetime”s to end an episode, well done
I actually had this very question running through my head for a few days. My problem is I'm in no way smart enough to get much further than that. Thank you for making this so well timed
Leonard Susskind has free lectures about this very subject....free on YT..have fun!!
@@bluntedvegas7028 I ask around cause why not:
Scientific Watch-Suggests, wnat some of those?
Not smart enough or not enough time to learn the math needed? The fact that you spend time contemplating subjects like this suggests to me that it is the latter... ;)
"Biocosm" has been on my reading list for a while. In the book, it supposedly proposes a "biological" evolutionary model of the cosmos where successful universes create more black holes, which are used to simulate universes with slightly different properties. I like the idea of advanced civilizations figuring out how to use black holes as giant universe simulators to do incredibly complex computations with, and some of those simulated universes go on to create more simulated universes, and maybe complex life gets more and more abundant with each generation.
WoW! What a fascinating thought... what IF. Hmmm... peace!
Sounds like the cosmological natural selection theory
I find it very disturbing with the idea that there are advanced beings that's okay with creating all these f'up realities... for no matter what reason...
@@Napoleonic_S how do you know this to be true? Just asking...
@@Napoleonic_Sif you think about it we can kill ants without thinking about it just how these beings if they're real create realities without a second thought
This was the subject of my final paper in High School AP Physics I titled "The Cyclic Universe Theory.". I received an A. The idea of infinite density doesn't make sense and something else must happen when the density reaches the Planck Length, a reaction occurs and a brand new Universe is generated. This has been going on forever, the Universe has no beginning or end, it just goes through an infinite series of phase transitions. 🤷🙏
"... when the density reaches the Planck Length" 🤦♂
Yeah, the volume-density reaches the size of Plancks length 10^-35m 🖕
@@eddieparris2803 The "volume-density"? Volume minus density? Volume multiplied by density? You cannot combine volume and density in such a way through any mathematical operation that would yield something even dimensionally-compatible with the Planck Length.
Planck Length has a dimension of "m" and "volume" is m^3 while density ("p") is "g/m^3" - you cannot nondimensionalize any combination of "volume" and "density" in such a way to result in "m" (except for trivially: e.g. m * p/p).
I'm enjoying the little sentence at the end of the videos detailing Matt's adventures within spacetime and our universe, he's like a little space explorer coming back to Earth to teach us new things and drop existential crises on us and then skeddaddles off to go on another adventure again... I love it! It's very amusing to imagine XD
If this is true, that means black holes could contains universes like ours, which also could contain black holes which also could contain universes, etc.
Perhaps we could be "stucked" between the infinite small and the infinite big, time flowing differently for everyone, like 1 sec for us is 10 000 years in a black holes.
I dont think so. Matter at an atomic level cannot be reduced below that size, so in my opinion at the center of every black hole is a mass infinitely dense rather than a space, because atoms are the bare minimum, at some point the "universe in a black hole's planets" would be smaller than an atom which isn't possible.
@@FlyingRep The idea could be that the laws of physics and constants are adjusted based on the black hole's formation, so the minimum size of the atom could be much smaller in the black hole.
@@FlyingRep I mean, who knows what the laws of physics are in other universes. They could be completely different. But it’s a moot point really because I doubt we could ever know
nope black hole is singularity object.. no time flow.. there time and matter become one.. a energy mix + information dataset..
So, size is indefinite?..
Huge thanks to Matt and the whole team behind PBS Space Time! This is one of my favorite channels❤️
makes so much sense, a black hole is so strong it can absorb light and light cant escape; our universe is exanding so fast light will never reach the end.
even if you would reach close to the border you cant reach it since i think space and time are going slower.
The problem is that yes it would explain the big bang, and also explain the multiverse, every universe having blackholes which are their own universes, but the problem is there still needs to be an original universe, with the first star, first black hole, which requires matter and energy, and since its the first universe theres no matter from outside universes to fuel it, so yes this is more probable than the big bang and the universe creating itself, it still requires an original creator.
Question: We've discussed that matter or "information" does not change in any way once it crosses the event horizon of a black hole. In a sense, it is frozen in time never to be altered. If in fact we are in a black hole could the Microwave Background Radiation be this matter or "information" that is forever frozen on the surface of the black hole that contains the entirety of our universe, seeing as it never changes?
"In a sense, it is frozen in time never to be altered." Only for the beholder outside, not inside.
What Matthias said: the information cannot be altered from outside the event horizon once it crosses into the black hole. It could, however, change within by another force
Anyway... the universe is constantly changing
I thought a blackhole was when a star goes supernova and collapses on itself, implodes and then explodes?
We are inside a star that went supernova? what? that doesn't make any sense
@@ajcook7777 Generally speaking that describes a stellar origin black hole yes - but there is speculation that not all black holes are formed through this process.
At the end of the day a black hole is merely a celestial object of such huge mass that its gravity allows nothing to escape - not even light/em waves once it reaches the event horizon.
For all we know the net gravitational effect of large clusters of galaxies actually causes much the same effect as a black hole, and we simply cannot view it from within.
Matt, you started me on this journey 4 years ago. I couldn't believe that pie chart showing that we understood less than 5% of the universe. This one is fantastic. Putting some science into my speculations about the role of black holes in the formation of the universe 👍
This is exactly what I've been speculating about for the last couple of years!
I think as we begin to understand dark energy and dark matter a little more, it might become possible or plausible to determine whether we do, or don't exist, within a supermassive black hole
When I was quite young, I proposed The Big Cheese model of the Universe: that the Universe at large was eternal, but inside every Black Hole, the Singularity appeared as if it were the Big Bang of a universe contained within the event horizon of that singularity.
Sometimes it’s the young minds who have the best ideas.
I had a very primitive model of special relativity that made sense to me in the third grade. I tied time dilation to the expansion of the universe, arguing that because the radius of the universe was larger in the future, something like centripetal force pushed faster objects slightly into the future.
That doesn't work, as it assumes an objective frame of reference, but it was simple enough that I could explain it to someone.
It's a shame black holes are just a theory. Call them Plasmoids.
I thought this many years ago as well, then later on the white hole theory was published, I think if a black hole has nothing else to absorb/eat eg outside of the event horizon could it possibly collapse on itself to the the singularity that then creates a Big Bang.
@@RenneDanjoule What are you talking about? Black Holes, at least until you get much beyond the event horizon, behave exactly as General Relativity predicts, and General Relativity has never failed a single prediction. We have observed objects that must be denser than any neutron star, and we have observed matter interacting with accretion disks. There is the recent famous "photograph" of a Black Hole, or more technically, the neighborhood around a Black Hole. We observe gravitational lensing.
Not a single astronomical observation contradicts the existence and behavior of black holes.
Do you even know what a plasmoid is, or does using the word make you feel smart?
Who else is being left wanting this masterpiece to become an actual series on traditional TV through our local PBS affiliates?
I ask around cause why not:
Scientific Watch-Suggests, wnat some of those?
Would be great for those who watch them in school. Personally, I am comfortable getting my head around the snippets on this channel for now.
TV is so 20th century... Everyone can see it here so why also on "tv"?
@@amlord3826 This "place" has also TV, YT is a form of TV.
Mind blowing theory, Excellent explainations. Fascinating video.. Mind blowing theory, Excellent explainations. Fascinating video..
Great video 👍
Back in the 80's when I took ASTR 101, the professor had us work on the density of black holes. What would be the radius and density of a black hole if the mass of it were 1 kg, like what if you made a black hole by compressing something you could hold in your hand. Very tiny, very dense. What if it were the Earth? Still small, like a baseball if I recall, but less dense. The sun, larger, less dense. Keep adding mass, the radius is larger and the density is less. He then asked us to consider the theoretical density of the known universe. So it's always been in my head, the mass of the the universe, given that it would not need to be dense, could be a gigantic black hole, we live in, and have no idea what's outside. Update: What I mean by 'black hole' is what's inside the event horizon, not the mass singularity itself.
An you wasted all of that money studying unproven nonsense...get a refund
You basically studied CGI cartoons
Also, the density of all Black holes are the same, infinite. All that changes is the radius and the mass of the Black hole, but not the density.
@@ShapeDoppelganger Also the density of the Sheeple believing this nonsense is astounding
@@davidsheckler8417 Believing in what, that black holes exists? There's no other affirmation on this thread.
Imagine our entire observable universe being just a spec within a superverse
The whitehole is the Big Bang. A location virtually impossible to reach. It's also the event horizon as viewed from the inside.
Ah, so that’s why light can bend. Because we live in a perfect spot inside a black hole where there are smaller black holes inside black holes?
I've been waiting for this video for so freakin long.
It's exactly what I've thought since learning how black holes work, especially the space/time flip that is supposed to happen when you cross the event horizon. It makes perfect sense that the time of infinite density being the big bang.
We were just assuming the direction of the flow of time was the same inside a black hole instead of it being mirrored.
Guess the whole "white hole" thing is just what another black hole looks like after you get to the other side.
Man! What an amazing time we live in! That we can explore the universe with such technology and ponder the deepest structure of the universe with such great minds is so exhilarating and exciting!
Thank you professor for spending so much of your time bringing us hard won knowledge and go
And thank you for bringing your obvious love and dedication to knowledge to us for all these years! Thank you sir, thank you!
ion think this dude a professor bro.
Hes just a grad student they prolly hired to fw this stuff
“Time”, yes. Amazing indeed.
@honkhonk8009 He most definitely is...
"Matthew John O'Dowd is an Australian astrophysicist. He is an associate professor in the Physics and Astronomy Department at the Lehman College of the City University of New York and writer and host of PBS Space Time on TH-cam."
Could a black hole form within a black hole?
Great video, first time viewer of your channel. Will be subscribing:)
I believe for some time now that our universe was formed from a black hole or a white hole within a black hole. The question is, how will we able to traverse in and out of these holes with impunity to explore these infinite multiverses. Another mystery: Was there an original universe that had black holes that started the infinite multiverses. Watch some Mandelbrot zooms on TH-cam.
Honestly, it makes perfect sense. The mind blowing question is "are there infinite black/white holes in an infinite hierarchy or are there an origin universe where all universes and sub-universes are in?"
@@ildar5184 that we create in the future and send to the past through a man made white hole, because we have never seen one and would have even crazier properties than a black hole 🤷♂️
That's the fun thing about infinite series even if there's a hierarchy you can't tell it imagine standing inside a pair of parabolic mirrors where space time would be bent around you in all ways and you wouldn't be able to make sense of where the start or the end of anything is that's infinite universe is nested within each other they can contain maximum fidelity over and over again and you would never be able to tell the difference because if you look up your ceiling would just Encompass down into your floor and become your floor to become your ceiling and so on and so forth so there is no need for an end or a beginning
@@averylawton5802 You just explained my last acid trip haha
I’ve thought about this for years and I’m glad to find I’m not the only one.
White holes don't exist
What I learned: if we're in the blackhole, what's outside?? Other living creatures wondering if they're inside a blackhole?
Blackhole-ception
Yes in fact everything outside our black hole would be massive in comparison to us because when you enter a black hole it breaks you down to smaller bits then atoms itself. Meaning a dust mite on our planet could be in fact as large as a lightyear in length in that universe while we would be billions of light-years in length if we somehow ended up our size in that universe.
That’s always been my thought since it’s mass is so great. It should compress everything into a universe
This is fascinating! But if we are in a black hole where is loses particles, how could our universe be expanding? Soo many questions!
If there was a black hole of this size, I would wonder how big the actual universe is. I also wonder what could make a black hole of that size?
If the universe was within a black/white hole, then wouldn't that explain away dark energy and the expansion of the universe as just being the result of gravity at a very large scale?
You can’t get inside a white hole. They push everything out and away
My theory is that gravity is the inverse of whatever force is expanding space-time. Otherwise all matter would be pulled apart from the stretching of space-time
@@twstdreality exactly why the universe is expanding at an accelerating rate .
My teori is that there is no black matter and there is no black energy . The space is expanding because a singularity or a huge black hole , that strech the space
Close - Dark Energy becomes nothing more than the expansion of your containing black hole, which expands your surface area.
Great video. I don't understand, but I like the subject material anyway. ✌🏾
That sounds badass
whilst i suspect that there are some definitive physics saying that it isnt the case, ive always thought that blackholes all seed either into separate singularities (one for each universe), or all seed into one singularity which, when all the matter in a certain area/universe is captured, becomes so intensely compressed that it erupts into a big bang and then expansion- rinse and repeat.
Agreed this has been my assumption too. I believe black holes in our universe to be a big bang in another universe thus creating the multiverse.
Thats a pretty interesting thought fo sure, I would not discount it. Wish you could ask a Physicist this question so we could all hear an answer lol
The idea that all black holes lead to a single singularity is very wrong. The base requirements for a singularity is a point in space, and, as we all know, you cannot have two points in space equal each other. Else causality would break.
But each black hole having it's own separate big bang equivalent singularity is unprovable. So you can believe it if you want, no one can't prove you're wrong.
@@simonlockley-evans9349 Yeah but if you think about it that way the likely chance of our universe being the "original" universe quickly becomes very low.
@@cheese4840 Agreed 100% so low in fact as to be beyond the normal range of human understanding. We are talking extremely large numbers that the human mind finds difficult to comprehend.
the idea of a nested universe makes so much more sense to me than the idea of a multiverse. there are so many parallels between earth scale and the cosmological scale, universes creating more universes just seems to fit the general parallel better.
there is also the factor of our universe expanding inexplicably - what if that expansion is powered by the constant feed of matter and space time into a black hole? or what if the collapsing of the initial star speeds up over time, explaining the acceleration of universal expansion? idkkkk it's all theory and questions i have but it's so interesting to think about!
It's fractal all the way down.
And up. And sideways.
That means the CMB is in part hawking radiation.
I beleive multivariate might still be possible even on top of this theory. Nothing is set in stone on how things happen there is no destiny as we all have free will in our choices. In another version of reality there are infinite ways things could've happened maybe an alternate you did something slightly different today. There isn't a way to prove this theory unless we can control time itself maybe even invent a device to jump to different universe inside different black holes.
I don’t see any reason why a nesting universe and a multiverse cannot coexist simultaneously…
@@ghosthunter0404 I’m not really sure that multiple diffferent universes of our realities is how the multiverse really works….I kinda think it’s being used as a misnomer for the infinite multidimensional existence of the universe itself, as well as ourselves
So... I was under the impression that if there is enough mass within the Swarzschild Radius, boom, black hole. Apparently, physicists equivocate on this when it comes to talking about the universe, but I'm not sure why. The observable universe HAS enough mass to be a black hole within the radius we measure. That should be end-of-story as far as my understanding goes. Why is it not? Please explain.
If we were in a black hole, that would explain why everything sucks so much lately.
I love the explanation you gave in the beginning that space is flowing like a river. Thank you for mixing it up and sharing your interpretation of the science and not copy and pasting whats already been done. Keep it up.
I loved watching PBS space related videos with my late grandpa. I first found out about black holes when I was six. I wasn't scared, just fascinated.
What if our observable universe is tiny and simply inside of a spherical crust layer of a Black hole expanding after having it's own "big bang"? Assuming that model works, The better question is what does the inner crust of our universe look like?
Empty space is dictated through gravity and dark matter is our universal crust layer. There's probably many similar planets in similar galaxies in our layer alone.
This theory is so interesting, and actually, in a strange way, a more comforting thought than us being in a mysterious ever expanding "space". In fact, seems more logical than just a random "big bang" started everything from nothing.
Now imagine being able to travel into blackholes, it'd mean universe hoping.
Could being inside a blackhole explain dark energy, as everything is being accelerated towards the singularity which because of the distortion of space-time inside a blackhole is actually located in all directions around you, so everything appears to be getting pulled away from you?
yea i have heard this somewhere before too. great thought!
*mind blown*
Woah
There is no evidence for the existence of dark energy, the same can be said for black holes.
Dark energy almost certainly doesn't exist since it has been shown that cosmological principal does not apply within our observable universe since the cosmological principal where it is assumed the universe is at some scale homogenous enough for the Friedmann-Lemaitre-Robertson-Walker metric to be able to be applied to our observable universe depends on the assumption that the CMB dipole is purely kinematic in origin as any other dipole component being nonzero would eliminate the applicability of a scale of homogeneity where the FLRW metric could be applied within the observable universe.
In the 1980's an experimental test was devised which could unambiguously test the pure kinematic dipole assumption though this test needed millions of cosmologically distant sources which could be used to construct a dipole in the sky that can be compared to the CMB dipole.
If the dipoles match in magnitude and direction the CMB dipole is indeed kinematic however if they don't match in both magnitude and direction then the cosmological components to the CMB dipole are nonzero and thus sufficient to eliminate all models assuming the cosmological principal applying within the bounds of the observable universe.
The results of Nathan J. Secrest et al 2021 ApJL 908 L51 using a final sample of 1.36 million quasars measured by catWISE reveal a dipole with more than twice the magnitude of the CMB which results in a 4.9 sigma discrepancy (only a 1 in 2 million chance of being a statistical fluke) from the CMB dipole so we can largely rule out the assumption and any model that depends on it if looking at the situation objectively.
Given that anisotropic cosmologies automatically produce the observed acceleration with anisotropic and inhomogeneous variation as had been largely demonstrated by work which doesn't implicitly assume the cosmological principal Occam's razor suggests there is no dark energy.
Could the direction of time that we experience as "forward" actually be backward to someone observing from outside our universe/black hole? In that case, all of the matter that to us looks like is expanding away from us would actually be falling into our black hole if we were to watch from outside it, I'm probably wrong but to me this would seem to help explain why the big bang was a moment of extremely unlikely low entropy, since in that view the collapsing of the universe would be inevitable, and that period of low entropy is what caused our perception of times direction to flip (maybe?), and the collapsing of the universe into the big bang may be what it looks like from the inside of a black hole as it radiates and shrinks due to hawking radiation
Maybe that's why I have this feeling that I've already died and that I am just re-experiencing my life as it once was.
I had a similar thought. A black hole is a singularity in space - the big bang is a singularity in time. Reminds me of penrose diagrams.
@@LochyP same, I kept thinking throughout the video about how space and time "swap places" inside a black hole
Yes
Entropy is not symetric.
I had though for years that the big bang is the other side of a truly spectacular black hole. What else could have the matter of trillions of galaxies and quintillions of stars and have that emanate out from a single point?
i love this and i feel high and im not even high
One way to define a black hole is a region in which light can not pass to another defined region of space. It is cut off from that other region, as light can not pass between the two. Around our universe, in every direction, we observe a red shift that is proportional to distance of observed objects. Extrapolating, this means that at a great enough distance, light from those vastly distant objects will red shift to a frequency of zero and be undetectable to us by any means. So, this meets the criteria for us to exist inside a truly enormous, massive black hole. And we seem to be just fine trapped in here with all the observable universe to keep us company. But it may be an infinitesimal fraction of the universe outside its boundaries.
This is heavy stuff. -- I think all of this is worth taking "seriously" in the sense that many discoveries began with a guess or "crazy" idea that later turned out to be true. We make advancements and discoveries by asking questions, some times seemingly absurd ones. It's how we learn.
May i ask you a Thing?
None of these scientific facts are actually facts. You do know that right. It’s like saying you know what gravity is…
@@mikekull7183 I mean, yes and no?
No one claimed he knows everything about Gravity, so therefore no one has been objectively wrong.
And yeah, we kinda do know an awful lot about Gravity already;
it wasnt discovered last Monday.
@@loturzelrestaurant I was speaking in general, not so much about him. We don’t really ‘’know” what gravity is though, nobody does or is
Would the inside of every black hole have the same physics we have in our universe?
I would posit that if this idea is correct, that of the universe being inside of a black hole, that it would have to lol. At least in one instance. Curious though right?
There is the hypothetical idea that certain universes could each have their own properties (curvature, cosmological constant etc.) and that if the black hole = universe hypothesis was true that universes could even go through something like evolution.
Universes that produced the most child universes (i.e. black holes) would then occur more often than universes that don't.
But none of this is falsifiable as of now.
Mind blowing!
Hawking radiation means things going out of the event horizon which will never return. Which is what is happening to the cosmological horizon too because of expansion of the universe. Could the black hole shrinking relative to the universe be the same as universe expanding relative to the singularity?
Hawking radiation is not leaving the interior of the event horizon though. It's the result of virtual particle pairs splitting at the horizon such that one particle is outside and can escape the gravity but the other is inside and trapped. The radiation is the escaping particles, de-virtualized by their inability to rejoin their partner and annihilate.
Bear in mind that if the universe is inside a black hole, that black hole almost certainly doesn't have a real singularity - it'll likely be something more exotic, such as a 2d sphere, or a quantum fuzzball. A real singularity can't represent a universe - it doesn't have the complexity necessary to represent much of anything at all.
Wherever math indicates a singularity, it's a very strong bet that something rather more complex and interesting is going on there. Similar to the way that the speed of light never actually *stops* you from going faster, it just approaches an infinite asymptote and time starts to warp instead. Similarly you should never be able 'reach' a singularity, even if you can always get closer to it, something akin to the speed of light should be kicking in as you approach infinite density which prevents that outcome.
Thats the jist of it. If compression is put on matter to shrink inward on itself in all directions then it would simply appear that the universe is expanding in every direction.
Been waiting on this one for years. Ask a spaceman touched on it about 5 years ago too.
His answer was essentially so what? Its possible and how does it change anything?
I appreciate matt and his team's response much better.
@@Vastin A mathematical singularity is just a 1d dot, and the real world is never that simple.
@@khatharrmalkavian3306 I heard that explanation for Hawking radiation too, but have also heard since then several times it is incorrect. There is a good Science Asylum video on it.
This encompasses what gets me thrilled about your work so well. Great job tying in so many ideas and presenting it in a way that lets the viewer hypothesize before you empirically lead us through. These ideas are a large part of what makes physics and science in general so interesting to people. In a world where it’s easy to get lost in the day to day scope of our lives, you and others who do this work make a thrilling testament as to how wild the ‘bigger’ picture might be and how fun it can be to think about.
Couldn't agree more.... Thank you for speaking to what my mind was also thinking.
If universes were simply black holes inside other universes, what would happen when black holes merge?
I probably understood 5% of what he said but was 100% interested 😂
Basically if a black hole radiates mass at the same rate as it absorbs mass, it could explain the universe we observe.
Currently there isn't any evidence to show that's what's happening.