How can a man be so intelligent, yet, so humble. He has taken astronomy to a fine art !

Always trust a man who speaks to an audience with such confidence whilst wearing sandals. Bravo sir. Jokes aside that was a wonderful lesson. Thank you.

I love how Carlo explains everything in a way that basically everyone can understand. He paints a picture that everyone can imagine. He gives everyone the chance to wonder along with him and his colleagues. That takes an extraordinary amount of talent I think. We don't always have the ability to comprehend the extreme mathematical complexities of the studies of astrophysics. But we are so privileged to get to learn and reflect on the wonders alongside those that do comprehend and are able to share it. Thank you to all who work so hard to make that possible. This is such an exciting time to live in. I can't wait to learn more

In last few days im obsessed with this person.. Listened his 3 audiobooks, Order of time, Helgoland and White Hole.. And i'm confident that, as a very much average student, i never loved physics so much.. I don't know where im going with these advance physics.. but the sheer beauty of science keeping me waking up nights and nights.. the way he has written them, thay way he explains.. It's personal, it's philosophical, it's poetic.. Yes, professor Carlo Rovelli is a poet.. ❤

21:00 - More specifically, it was meant to illustrate that Human Intellect or Reason (represented by Virgil) could only go so far and couldn't be used to understand divine redemption or paradise. That has to be one of my favorite stories ever. So much philosophy is crammed into that single poem (Inferno) that it's practically bursting at the seams. The fact that this gentleman is using that as a way to relate to Einstein's theories is absolutely brilliant.

Yeah but what is it? I don't expect anyone to get that reference, but trust me it is perfection.

Carlo is truly one of the all time great physicists since Galilei himself, as well as one of the nicest you will ever meet!

Superb. Rovelli not only describes the phenomenon of the universe through a black hole but gives a profound perspective of the meaning of discovery through the ages; "to leave some of yourself at home."

The poet of physics! the physicst who is the most refreshing science communicator... who is not a cold ruductionist... I have now bought this book too! i have got three of his books now! Absolute joy in reading them!

How wonderful to have this lecture get uploaded to soon after the books release! TY RI production team

Carlo Rivelli is an absolute genius and very lucid. Will certainly keep an eye open for more of his lectures and books. I wish him and his team good luck with the dark matter detector, which could really be a game-changer for Physics if it is successful.

Very impressed with this video. I have always been interested in astronomy and physics. It was things like this that drove me to enter those professions. Thank you for feeding my insatiable curiosity about the universe and the wonders that we discove

See also BBC Red Dwarf “so what is it?”

Certainly worth another watch.

I very much appreciate Rovelli's lateral thinking and thought experiments. In recent years we have got a bit too obsessed with giant experiments. These have told us a lot but now more time is needed thinking things through and coming up with testable ideas.

The physics - established and speculative continuation of that - is fascinating. But the real message for the public understanding of science is what Carlo discussed in the last few minutes - the central place of the imagination, and emotional and intellectual response to the imagined, in the development of science. In wrestling with a problem, possible answers (not all right!) come in response to the 'simple' question: 'What if .... ' What indeed!

So nice to see Carlo Rovelli at RI. I like the way he think.

Thanks for this great talk! I've heard you some days ago on the Lawrence Krauss podcast and it almost drove me crazy that he did not let you finish at least one thought. That was not only rude, but also unfair as he was the moderator and "opponent" at the same time 😌 I am still working on understanding your hypothesis as an interested non-scientist with some background, it is incredibly interesting. What an exciting time to be alive!

Thank you. Wonderful details, and deftly handled 'leap' from mechanical to quantum descriptions. Especially liked the last chapter: critical to all our work, and our greatest strength.

I love this so much , so cool to hear such theories being discussed and given a voice

0:00: 🌌 The universe is filled with black holes, a surprising and beautiful discovery. 6:05: 🌌 The video discusses the optical effects and size of a black hole, as well as the experience of approaching it in a star ship. 11:55: 🌌 The speaker describes entering a black hole and observing the geometry inside. 17:02: 🌟 The video explains that black holes are formed from collapsed stars, not singularities. 22:48: 🔬 The video discusses the concept of quantum gravity and the theory of loop quantum gravity. 28:18: 🎥 The video discusses the trajectory of falling objects and how it relates to the Einstein and Newton equations. 33:31: 🌌 The speaker discusses the concept of quantum gravity and the idea of space-time itself undergoing a jump or transformation. 38:47: ! The speaker discusses the concept of time distortion and how it relates to a star collapsing and bouncing back. 44:50: 🌌 A white hole is a hypothetical object with a gravitational force but no electromagnetic interaction, potentially explaining dark matter in the universe. 50:21: 🌌 There is more dark matter than regular matter in galaxies, and it is more diffused, making it difficult to detect or interact with except through gravity. 55:35: 🌍 The video discusses the perspectives of Copernicus and Kepler on the solar system and how they imagined it from different viewpoints. Recapped using Tammy AI

Perception may hold us to a beginning and end, but a continuum that is unending is my personal outlook. A beginning that is impossible to know and an ending that will never come.

I love this channel! THANK YOU for such beautiful mental engagement.

I had no idea it was so dusty near black holes that you had to keep hoovering the spaceship.

In University I was studying as a double major in Math and Physics but I found I needed to eat regular and I figured so would my future wife and children so I pursued a professional career in a different field. What I found as I progressed in my career was that if I approached an endeavour from the same prospective as my competitors my success rate would be average. Because they and I were all trained to look at the problems we would face in a particular fashion. So what I decided to do was to not look at the problems from the the normal set of rules exclusively, I would look at the issue as I knew my competitors would be doing, but I would always try to look at them from an entirely different and sometimes radical approach and see if that took me to the desired end. It didn't always work out but when it did the results achieved were sometimes far more efficient and personally satisfying. There are always alternative approaches to any problem and if you see a whole herd of anything banging their heads against a wall maybe you should look for a way around the wall, or over the wall, or under the wall, or avoiding the wall entirely especially if you are adverse to headaches.My alternative journey always begins with..."What If"

This guy is one of the greatest at explaining high-order physics

What an incredible communicator. Blending poetry with physics to bring us closer to "truth" better than most other science communicators I've come across. Bravo, Carlo!

Never seen a man in Tevas sandals captivate an audience at the RI quite like Dr. Rovelli there. GOAT.

This lecture is a classic! Professor Carlo Rovelli belongs to the Pantheon!

I got a ton of extra understanding of the subject by him just using his hands. Lovely presentation.

When that bell rang at the end, I was like "LET HIM COOK"! Great talk!

Facinating subject thank you for the high quality lecture

I'd say we call our star ship "USS Vaccum Cleaner", since it is hoovering around the black hole.

Sir, you are a wonderful teacher!

Very pleasant to watch and listen. Thank you Carlo Rovelli.

Astounding and inspiring discussion Snr Rovelli. Thank you so much.

I understand the Royal Institution must have a strict schedule but c'mon, let the man finish his final parting sentence! He's speaking physics as poetry let him cook.

I sad to myself i would like see some good physics lecture. There it is. Lord Timekeeper Carlo Rovelli himself. Thank you for it.

Many thanks to Carlo for this very brillant presentation on a difficult and complex subject without equations and mathematics.

The sound of his black hole model sliding in and out absolutely shatters my nerves

I want to listen to this so badly but my misophonia is overdrive. That microphone is picking up every individual tastebud.

Love professor Rovelli. Thank you.

Great performance from Mr Rovelli 👍 that was an insightful and accessible mind travel into Black hole and White hole realms without a single equation!

It's so beatiful! Bravo, maestro Roveli!

"Imagine we're traveling toward a black hole." The way the state of the world is right now that's not so hard to imagine, really.

"Religion began when the first scoundrel met the first fool." -- Voltaire

WOW....I NEVER KNEW this part and I like to say I try to stay in the astronomy loop....thank u very much for this💎

I love how one blurry image circulates through the community!

I have a problem when any scientist talks about matters we do not fundamentally know, as if we do know. It really erks me when he said a little bit less than half way through, that all he had just described was based on stuff we know very very well. It's not. It's not even that we don't know a lot of it. Everything beyond the event horizon we know literally nothing. So the geometry inside we know literally nothing. Whether or not it has a singularity we know nothing. How objects behave inside, we know nothing. I think the most ludicrous thing he suggested is that we know instead of a singularity, it's actually just the collapsed star all ostensibly safe and sound, the same way it was the moment of collapse. This is most ludicrous because a, we fundamentally don't know, and b, there is absolutely no math that even remotely suggests that that matters from the collapsed star just stays the same, stays bound together, the same size it was the moment of collapse. If all of this is based on Einstein's theories and those mathematics, the math says it's not even possible for that matter to stay together. You get infinities when you do the math. When you calculate the density of an object massive enough to force a transformation into a black hole, the only thing that is ever on the other side of that equal sign is infinity. We don't know why that is. Most people say it's because there is something we are missing because we can't combine perfectly, relativity with QM. They say it's because we need a theory of everything. Personally I think QM and relativity are actually already the whole picture and they can't be put together in order to illuminate that which is still hidden to us by them remaining separate - because that which is still hidden is FUNDAMENTALLY unknowable. I think what happens inside a black hole, is fundamentally unknowable. The Heisenberg Uncertainty Principle says both the momentum and position of a system are unknowable fully simultaneously. Instead of having to specifically state momentum and position, I think it is reasonable enough to simply say that you cannot know all the information about a system at the same time. Now if we investigate further into the specifics of the principle, when we use examples, we realize something stranger that I honestly think most scientists don't fully come to terms with or they just disregard it at a relic of the mathematics. When you know the position of a particle, it's momentum ceases to exist. If you know the position, that means you have locked it down, into a single frame so to speak, like taking a slice out of time and defining its position as it is seen to be in that slice. But if you take a slice out of time, the object whose position you are defining stops moving through space, because you can't move through space without also moving through time, so if you have stopped moving through time you inexorably stop moving through space. If you aren't moving through space, you don't have momentum. That is just a physical fact of the universe. If you have stopped moving, there ceases to be information that defines your momentum that can then be used to calculate it. The information about your momentum literally, fundamentally, ceases to exist. Likewise when you try to define position when you have momentum, you ultimately fail because if something is continuously in motion it's position is always changing, and a single reference frame for it's position cannot be defined. The information itself does not exist because it has no position, only a change in position. You can define and calculate the change in its position, but not it's exact position. The only way you can do that is if you take a slice of time and say this is it's definitive position. But alas, as we just discussed, when you do that, the information about it's momentum ceases to exist. So what the Heisenberg Uncertainty Principle ultimately says is that you cannot fully know everything about a system because some of the information itself about that system, does not exist to be known. I believe this is why we will ultimately never know what happens inside a black hole. Sir Roger Penrose actually proved that Einstein's theory naturally, generically, lead to the creation of singularities in all solutions, which includes those pertaining to black holes. So again, at least as far as the math shows, singularities do exist at the center of black holes. Personally, I think the reason we get the information paradox, the reason we get infinities when we calculate the density of black holes, is because at the singularity, the spot where there is infinite density, there is a rip. This rip is a literal tear in spacetime, and on the other side of that rip is the Inflation field, the true vacuum from which our false vacuum universe inflated. This is why all the original information that false into a black hole literally ceases to exist in our universe, because it is dragged outside of it and spit into the inflaton field where i cant even begin to contemplate what happens to it. I also think that the reason this hole, on the other side of which is a true vacuum, doesn't instantly grow the moment it's created and lead to vacuum decay is the immense gravity that's keeping it confined. Which is paradoxical because it is the immense gravity that creates the rip in the first place. Then as the black hole evaporates, the density stays infinite until the finale moment of evaporation, and then when it disappears and the immense gravity lets up - since it was gravity thst both created the hole and kept it from getting bigger - the tear in spacetime simply seals shut.

Sir Carlo Rovelli is also like Sir Richard Feynman, Nice Lecture by him✨

Brilliant lecture Carlo.

Wonderful lecture. Thank you

i feel like moreso than anything else i've seen here latetly that this is actual real science for scientists vs entertainment for kids ... more like this please d(^__^

Props to the mic guy, love how 90% of the audio is Carlo's breathing. Why not stick it halfway up his nostril next time? thanks

That was excellent!

Hard to listen due to the mic picking up tons of extra noise. (Plastic scratching, fabric rustling, air/wind/breathing whooshes.

Wow! Wonderful lecture. So very intellectually stimulating. Physics (human curiosity) is not dead !

That was an absolutely fascinating lecture! With all the fake science stuff floating around on UKposts, I'm so glad we have channels like this one and World Science Festival (and a few others) to really promote and expand general scientific knowledge. Thanks for this lecture and for the many others I've watched!

Time dilation taken to the absolute extreme. His "White Holes" book on the same subject is mind expanding, too. Genius.

His optimism is infectious! Crisis in Cosmology? No way! There is a lot more to be found out. I’m inspired to find something to keep humanity going!

Спасибо, это гениально.Дали подсказку на давно беспокоящий вопрос, и ответ получен. Ещё раз спасибо! Представим что пространство не обладает локальностями, тем не менее оно наполнено средой, нет ещё цифры как отображение цикличности и запуска процесса движения в этой среде, что тогда? Вообще, очень интересная передача для анализа. Выходит, основа материальности движение, а Человек может приходить в любую материальную реальность. Поручается, Человек вне времени и у него есть философский взгляд на все процессы разом ( интересный расклад). Кризиса в физике просто нет, есть стереотипы восприятия окружающей реальности на основа старых представлений. В чём дело? Просто, как говорит Миша Хазин " Будь как Акын, что вижу о том и пою", анализ процессов изумительно удивит.

Carlo is always good and insightful. Love his books, both his physics texts and his historical books.

If you measure anything with a quantized tool (math) your outcome will naturally be quantized. What if there is a type of math that isn't quantized? What if there is a seemless, gapless, whole stream used to measure? Afterall , numbers have spaces without function between them 1gap2gap3gap etc.

This was rough to listen to on headphones, the mic settings and his dry mouth 😬

"So, what is it?"

The length of the well beneath the star may dictate the wavelengths able to escape. The longer and more thin says xray bands alone would be constant which also cancels attributes of light , blackened out or cancelled sources may be all that is able to be picked up. A better well theory which acknowledges this may be needed .the difference between a star or a black hole may be the choke point delivered by its wells ultimate depth. What a fun time to be science minded and a witness to such things as they develop clarity😊

This really gets better towards the middle and especially the end. 52:24 Science as Mind Travel 56:49 The point about changing perspective 57:39 What do we keep with us, and what do we leave behind when making the next jump (- leaving behind the stage of space and time).

Add your Red Dwarf quotes below 👍

FINALLY, A White Hole standalone or so I believed 😂. Kind of a cornucopia of the edge of Physics.

Awesome 👏👏👏

Nice talk, some dots didn't connect for me in detail but that's a popular science version for mere mortals like us

Omg the sound is terrible. Can't possibly concentrate on what's being said

He lost me when he started speculating about dark matter being Planck-mass white holes. A black hole that size would evaporate in fractions of a second.

Q&A for this one, please. ASAP!

I do like Rovelli's lectures. I'm not even physic student, but it is so good and interesting!

I really get tired by people proselytizing their culture in an unrelated setting. Dante this, Dante that. Dude, just get to the point.

There's a subtle concept that he sort of missed in his explanation of the ship slowing down as it approached the black hole, although perhaps not too important just to make his point. Yes, you can explain it as time dilation, as he says, but the interesting question is why are we seeing the ship's apparent "movement "slowing, something that we would NOT see if the same ship were accelerating toward the speed of light using its own engines cutting across our field of view. In the black hole example, we are talking about gravitational time dilation. In the second example we're talking about relativistic (kinematic) time dilation. In the black hole example, it would appear as though time is passing more slowly for the ship as it approaches the event horizon. The ship would seem to slow down and never quite reach the event horizon, effectively appearing to 'freeze' due to the extreme time dilation effects at this boundary. In the example where the ship is accelerating under its own power, the situation is different. Special relativity, which governs this scenario, dictates that time dilation would occur relative to the ship's frame of reference. To an observer on board the ship, time would seem to pass normally. However, from the perspective of an external observer (such as someone watching the ship fly by), the ship would not appear to slow down. Instead, it would be seen moving at high speeds, as expected. The time dilation in this case affects measurements of time and length within the ship's frame of reference, not the speed at which the ship is observed to move.

That was really interesting

Some white holes I know made an excellent thanksgiving dinner AND cleaned afterwards while we watched football

“So what is it?” 😂 Jokes aside this was really interesting… although I excepted it to “spew” matter and time back into the universe…

Rovelli is not actually describing a black hole but a cyclical model of the universe in its contraction phase. It describes how the contraction of the universe turns into an expansion.

I'm sure he knows much more than me, but one small semantic correction: when you experience time dilation with the messages near the black hole mass, you are not seeing the future, you are travelling relatively slower through time. You are always in the present and feel normal, but when you return to earth many thousands of years will have passed more than according to your frame of reference.

Someone get this man a glass of water

My understanding is the light is not "bending", it is travelling in a straight line through curved space-time.

1 sec in black hole = 1 day on Earth. 1 min in black hole = 60 days on Earth. 10 mins in black hole = 600 days on Earth. 1 hour in black hole = 3,600 days on Earth (approx 10 years). 24 hours in black hole = approx 240 years give or take. 30 days in black hole = 7,200 years. 12 months (approx) in black hole = 86,400 years.

46:00 this way it would make sense for galaxies as matter going from white hole cloud to black hole center.. might be this way? could galaxy be considered a space itself, something like cosmos bubble then? and for bigbang.. what happens if we run around a dimension? could it have edge? since its most probably single self interacting entity.. what would happen if we go over edge of 4th dimension? does it bounce, or has it a counterpart out of phase that will switch at the edge? or.. will you get wehere you started..

Well, there is so much information about black holes and the principles of quanization of space and the application of the theory to these objects, but I have never heard of the hypothesis regarding black matter and old slatted white holes, which are the source of gravity in galaxies.

"American Pie is finished; Congo is most prosperous; there's peace on Earth, everybody is loving everybody-" we have VERY similar visions of the future.

Pretty good. A bit rambling at the end there but it’s definitely time for new ideas in physics.

Fantastic! My reflections are: 1. General relativity tells us that the experience of time is entirely relative. 2. Quantum theory tells us that our experience of matter is also relative. 3. Some theories suggest that the force of gravity appears weak because it is mediated across many dimensions. 4. Imagining that the universe is, to all intents and purposes, eternal and self-regenerating, could “dark matter” therefore simply be the legacy gravitational signal of matter which has since “transcended” to another dimension via black ->> white holes?

Great video, but at the 25:45 mark you say we get to the “individual grains of space”. Maybe I’m missing something but if the general understanding of what is meant by ‘space’ is that it describes an area or place that it is empty, I do not understand what is meant by ‘individual grains of space’. Can you please explain? Thanks.

A black hole is just matter that has gotten so dense that it bends space time to the point that light can no longer escape. We don’t need to complicate something we’ll never be able to see(with carbon eyes), just to understand what an outer shell of ship might see… matter attracts matter, when enough matter attracts other matter, and fusion occurs to create more and more dense matter; space time is eventually pulled in far enough to itself, that space actually hides our viewpoint of that matter… A black hole is there for not a thing, but a condition of space that a thing creates once it reaches a negative acceleration or mass density of a certain point; classifying all these conditions as just black holes, completely misses what they could be… Also, White holes have been recorded at the atomic level, at CERN; first thought to be miniature black holes based on the x-ray signatures, meaning there’s some sort of relationship to when matter accelerates beyond a certain point, or decreases it’s density.

Can someone please explain the blue shifting toward us at around 10 minutes? I get the Doppler type red shift of the rock or clock falling in to the hole but not so much the blue shift of earths messages toward us the way he described them.

Good idea, the detector machine. There are so many things flying by and we dont know, unfortunately.

I wonder if it would be possible to calculate, assuming spaghettification can be ignored, a trajectory of a photon or particle upon exiting the other side of this black/white-hole scenario. Does it even make sense to consider relative trajectory when working with timescales on either end of such massive events? ~39:30

If you come out the same place you enter, would you not be the energy that is directly emitted? If so, could you not perhaps follow an energy stream emission on its path out into the universe say a few billion light years and check to see if it eventually becomes say a stream of hydrogen atoms (etc.)? Or would the mass be too jumbled up in the flow of spacetime to track?

Work of Art Carlo! Wonderful. Thanks.

Beautiful

So, what is it?

it was intuative, but i never really realized that a black whole might literally be "bigger on the inside" thats cool