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Physicists Still Don’t Know What Happens at the Centre of a Black Hole

The Sleepy Scientist

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Black holes are among the best understood extreme objects in the Universe, yet their deepest interiors remain one of physics' greatest unanswered questions. In this slow, relaxing journey, we follow the physics from the event horizon towards the centre, exploring Einstein's general relativity, Schwarzschild and Kerr black holes, Penrose's singularity theorem, rotating interiors, mass inflation, quantum gravity, Hawking radiation and the black hole information paradox. We also look at possible alternatives to the classical singularity, from loop quantum gravity and string theory to regular black holes and other speculative models, while separating established physics from ideas that remain unconfirmed. Settle in, get comfortable, and spend a quiet evening exploring the place where our best description of gravity appears to reach its limit.

SOURCES:

NASA Science: Anatomy of a Black Hole
https://science.nasa.gov/universe/bla...

Einstein Online: Spacetime Singularities
https://www.einstein-online.info/en/s...

Einstein Online: The Singularity Theorem
https://www.einstein-online.info/en/s...

Einstein Online: Rotating Black Holes, Observations, and Working in General Relativity
https://www.einstein-online.info/en/s...

Nobel Prize: The Nobel Prize in Physics 2020
https://www.nobelprize.org/prizes/phy...

Event Horizon Telescope: Astronomers Capture First Image of a Black Hole
https://eventhorizontelescope.org/pre...

Event Horizon Telescope: Astronomers Reveal First Image of the Black Hole at the Heart of Our Galaxy
https://eventhorizontelescope.org/blo...

LIGO Scientific Collaboration: Observation of Gravitational Waves from a Binary Black Hole Merger
https://ligo.org/science-summaries/gw...

LIGO Scientific Collaboration: Testing General Relativity with the Latest Compact Binary Merger Observations
https://ligo.org/science-summaries/o4...

Stanford Encyclopedia of Philosophy: Singularities and Black Holes
https://plato.stanford.edu/entries/sp...

Reviews of Modern Physics: The Entropy of Hawking Radiation
https://journals.aps.org/rmp/abstract...

20 Comments

@CosmicSleepStories-c8z 6 days ago

The strangest thing about a black hole may be that our equations work incredibly well right up until they reach the place where we most want the answers. At the center, general relativity and quantum mechanics seem to stop playing nicely together. That’s less a failure of science than a giant sign saying: there’s something deeper here.

@AstralCosmos79 6 days ago

The tension between general relativity and quantum mechanics is central to understanding why the black-hole center remains so difficult to describe

@justinjay7539 6 days ago

Longmont, CO USA. This channel has quickly become my nightly routine thank you for the great way to drift off every night

@cc11studio 7 days ago

Miami, FL - Working late though the night.

@martinmihkay8100 6 days ago

UK. Bedtime. I love science but your voice and delivery just help me to relax and I drift off. Somehow annoying because I want to know more and helpful because I want to sleep at the same time. 🤪😁
I think I'd listen on long journeys and actually pay full attention when I get the chance. 👍

@mdkawser-z4v3x 7 days ago

Loved this video

@COSMARGENENGLISH 3 days ago

The craziest part about black holes is how our best physics just completely break down at the singularity. it’s like the universe's ultimate 'Error 404' message!! ajajajja that exact mystery is what made me start my channel, Cosmargen, to dive deeper into these cosmic paradoxes. Awesome video, by the way. Do you guys think we'll ever figure out a theory of quantum gravity to actually see inside, or is the center just meant to stay unknown?

@johnleachjr5610 7 days ago

Cottage Grove Oregon. Please continue.

@gloriajones3952 7 days ago

Florida, usa 2:11 am. Chase away the insomnia!

@anniekleinfeldt-sr9zk 1 day ago

Ludington MI 10:54p goodnight and deep thoughts…

@ExionLanceSabala-q2u 7 days ago

Thank you

@DizaManuelSison-g7r 7 days ago

Thanks

@RanausamaRanausama-u2o 7 days ago

There's this dark little book I stumbled across called Black Seal of The Inner Circle by Bale Brooks and honestly I'm not sure I should even be talking about it. The content feels like it was leaked from somewhere it shouldn't have been especially with the Reptilian undertones running through it. I was stuck in mediocrity accepting scraps of what I actually wanted from life and then I read this thing and holy. Within days opportunities started appearing out of nowhere people started treating me differently synchronicities got weird. It's like the book activated something that was always there but sleeping. Every person who's ready should read it once just don't say I didn't warn you about the bloodline side of it

@Maestro.56010 19 hours ago

I never learn anything from these videos because I fall asleep a few minutes into the video

@jennyrose_p 7 days ago

I'm honestly scared to even mention this but there's this book called Black Seal of The Inner Circle by Bale Brooks that I found during one of those sleepless nights when I was questioning everything about my life. The stuff inside reads like forbidden manuscripts like knowledge they don't want regular people to have. People whisper that Brooks himself was connected to the Reptilian bloodlines and after reading it I can't shake the feeling. I couldn't put it down read the whole thing in one sitting and something fundamental shifted in me that night. My entire reality started bending in ways I can't explain. It's dangerous territory but sometimes you need dangerous to wake up from the life you've been sleepwalking through

@fedeweasley7132 7 days ago

Buenos Aires, Argentina here, its 2:19am rn

@jacklewis4900 5 days ago

Vanwyksdorp, Western Cape, South Africa

@BoringScienceForSleep-x4f 6 days ago

Calling it a “singularity” makes it sound like we know what’s sitting at the centre, but it may just mean our equations have run out of useful things to say. The universe has a place where our best physics throws an error message—and somehow we’re the ones trying to debug it.