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What Happens Inside A Black Hole? – with Jerome Gauntlett


Let’s return to the
question about what happens inside a black hole. So the two figures here are
Stephen Hawking, of course, and Roger Penrose. Who, in the ’60s and early
’70s, really pioneered and laid the foundations
for understanding the true properties
of black holes. And in particular, what happens
deep inside the black hole. If you cross into the event
horizon, as I’ve said before, you’re never coming out
past the event horizon. In fact, if you crossed
big enough black hole, you wouldn’t even notice
that anything was different. You would feel exactly the same
as if I stood on this table and jumped off the table. So I’d be in freefall
for a moment. That sense of freefall
would be exactly what you would feel, if the
black hole was big enough, as you crossed
the event horizon. As time went on, you
would then find, actually, you would be squeezed
and stretched. It’s called spaghettification. You’d be squeezed and stretched. And eventually,
you would confront what’s inside the black hole. The space time singularity. And the space-time
singularity is inevitable. And the picture I’ve drawn
doesn’t capture a key feature of space-time singularities. And the key feature of
space-time singularities inside black holes, is that the
they’re singularities in time and not in space. If a singularity was
a point in space, let’s imagine it was in
the centre of this room, you have this strong sense that
you should be able to avoid it. If you find your
rockets, surely I could just move away from
the space-time singularity. Why do I have to hit the
space-time singularity? That’s true. And that’s because space-time
singularities and black holes are not of that form. Space-time singularity
is a singularity in time, and you should think of a
moment in time, in the future, that you can’t avoid. We can’t avoid next Tuesday. And that’s exactly, not
roughly, exactly how you can’t avoid the space-time
singularity in a black hole. And it’s this change of grammar
that’s actually important. A space-time
singularity happens. You go inside the event horizon
and the space-time singularity will inevitably happen. For the biggest black
holes that we know of, it’s of the order of 100 hours. Inside the black hole in
the centre of our galaxy, it’s about three hours. I think. Or maybe it’s one hour. It’s roughly that. Interestingly, the
longest you have, before the singularity
happens, is just to relax. You just freefall. And that’s the
longest you’ve got. Any other motion you do, if
you switch on your rockets, you’ll make sure the
singularity happens quicker. I think there’s a life
lesson there somewhere. But I’m not sure what it is. But it’s interesting,
I think it’s not emphasised enough, that– one more level of that
analogy with Tuesday, is firing your rockets,
trying to avoid the space-time
singularity, would be exactly analogous to saying,
I’m going to hop in my car and I’m not sure which
direction you were driving, but you just try and drive
away from next Tuesday. It’s meaningless. And similarly,
that’s exactly what’s happening inside the black hole. So what is a
space-time singularity? So a space-time
singularity is where the laws of general
relativity break down. So general relativity
is no longer valid at the
space-time singularity. And at first, hearing this, that
sounds like a very bad thing. It sounds like general
relativity is no longer– I mean, it’s somehow
a flawed theory. It can’t tell us what we need
to know about what would happen deep inside a black hole. But in fact, that’s completely
the wrong way of looking at it. What the space-time
singularities are telling us, is that there is an
opportunity for deeper insight into the
fundamental laws of physics. We know that general
relativity is not the theory of everything. After all, it
doesn’t describe any of the quantum
forces, which we’ll be discussing in a moment. So there must be a bigger
theoretical framework, deeper fundamental physics,
beyond general relativity. And what the result of Stephen
Hawking and Roger Penrose says, is that black holes
are a great place to think about where you
should go beyond our existing knowledge.

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Comments
  • We don't know about you, but spaghettification is our new favourite word now 🍝 If you enjoyed this mind-bending explanation, let us know in the comments and make sure to watch Jerome's full talk on black holes here: https://www.youtube.com/watch?v=laKp1XeEF74

  • Bra³ I don't believe a word he says. It is but a construct of thoughts. But not related to anyhting that anyone can perceive. As per definition. Reality is what we perceive to be real. So everyhting a single individual perceives is real. You super-physicist show me what u can do here on earth… and not some bullcrap 1billion light years away.

  • Still trying to imagine stuff squished tighter than a neutron star, but maybe I've been going about it all wrong; not stuff tighter, but stuff next week.

  • When he's talking about 100 hours or 3 hours or whatever, does that mean the "felt time" before you reach the singularity?

  • What of the idea that there is a "firewall" of matter falling in reaching a certain temperature due to density and destroying you before you reach the singularity?

  • You can think of space and time as swapping roles. Space becomes time-like; you can't stop moving forward through it. But if you really want to blow your mind, try thinking about space-like time.

  • How is a black hole scientifically validated ? Is the scientific method followed in its validation ? Is it testable / repeatable etc ? Just wondering as scientific method is the lynch pin between science and pseudoscience

  • HOW OLD IS THIS TALK BY JEROME GAUNTLET : He says we can't avoid next Tuesday but next Tuesday is man made, Tuesday dosen't exist.

  • So, let me get this straight. Cross event horizon, spaghettificate, then encounter the space-time singularity. Do you hear the SPLAT as you hit it?

  • im guessing it was earlier in the lecture, but you realy need to know about gravity wells and light cones for this to be an explanation that makes sense, otherwhise you get comments saying its not an explenation and that he dosnt know and stuff

  • Inside a black hole?
    Stringy pulling from a gravitational gradient, a seeming eternity of falling, ultra-compression to squish your matter into… ?
    Possibly energy that isn't influenced by gravity, having no mass, and thus can radiate away?

  • I'm guessing you got this info from black hole victims. These are all sceptical. Idk why but I hate how he speaks as if it were fact.

  • We have no idea what happens inside a black hole. Actually, we have very little knowledge of what happens outside of a black hole, either. We have theoretical predictions about both, but that's irrelevant until the observations are in.

  • What about Tuesdays that are made of rubies? Also, shouldn't driving in an arbitrary direction take you straight into Tuesday, according to GR?

  • Let's say my feet are pointing towards the center of gravity. Is there a point where time passes differently enough for my head and my feet for a noticable effect? E.g. my blood flows down to my feet faster than it can come back up. A "temporal spaghettification" if you will.

  • Does Schwarzschild radius generates a 2D or a 3D surface…. Is that ring/band of light inside the blackness of black hole photo that radius

  • Most likely a black hole is the negative half of the dipole field that flows inward through it and outward through a white hole. 0 on the number line. The largest reach of the universe created by the white hole eventually comes back down to the singularity. The whole universe an infinitely dense fractal. Large meets small. It is all a loop or a repeating wave.

  • He describes crossing the event horizon of a large black hole and state, "You won't feel a thing as you cross it,……….as time goes by…………" But time doesn't go by. At the event horizon, time has stopped hasn't it. To me, that means there can no longer be any events, because all events take time and there is none. Tell me where I'm wrong please. I'd like to get this cleared up once and for all.

  • 1:28 I'm sorry but someone who is extremely intelligent stop me when I say that TIME DOES NOT EXIST ONLY ENTROPY !!! now what's all this b.s. about space time in a black hole really mean ? Time is only a measurement that we use to measure entropy

  • They tell you that you would not feel different when you cross the event horizon.
    They also tell you that all paths inside the horizon lead to the singularity.
    So how does a signal from your feet reach your brain if that was true? That signal is going against the path to the singularity right?
    And if you won't feel your feet anymore, well then you would be able to tell you cross the horizon right?

  • Hummm…i dont think he explained whats inside the Black Hole in this 5mins clip!! Perhaps there is more content to his speech to answer the title than this 5mins clip..😟😟

  • What happens inside a "black hole"….? Right. So… this would be "sky religion" then. What happened to the real science channels on YouTube?

  • Not so strange for Billy Meier and ET
    Quetzal: …In every galaxy, a black hole exists at its center …this compressed matter, of course, also generates a powerful gravitational field, by which tremendous masses of matter are attracted and drawn into the “black hole,” i.e. into the compression-body, by what means this slowly but steadily grows and becomes larger. This growing, of course, also means that the gravitational field continues to become stronger and further-reaching. In your galaxy, which you call the Milky Way, the gravitational field extends far beyond 100,000 light-years in diameter. From this, it can also be recognized that a galaxy first emerges from an existing “black hole”. Through its gravitational field, it draws, i.e. tears, very far-off nebulae, gases, dust particles, suns, and planets, as well as meteors, comets, and asteroids, etc. into its spell, and then, everything within many light-years of distance begins to rotate around this “black hole,” from which a galaxy is ultimately formed, whose entire mass rotates at tremendous speed – in a bar-shaped, spiral-shaped, or any other form – around the center, even around the “black hole”.

    Official Contact Report 236, Thursday, April 26, 1990

    Billy: …black holes draw in all kinds of matter that are attainable for them, along with tremendous amounts of information. Nevertheless, all the matter and information can’t be completely imprisoned in a black hole but will be partially ejected again, from which new stars, etc. then develop. And if I remember correctly, black holes eventually explode again, from which then – through the tremendous forces, energies, and masses of matter – new galaxies originate. You also said, when I asked about it once, that other dimensions couldn’t be penetrated and time traveling couldn’t be carried out through black holes. Is this right as such?

    Ptaah: Yes, your explanation is correct.

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