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

📖 Our quantum physics ebook, including the complete narrated audiobook, is available at https://thesleepyscientist.com 🎉 The first 100 readers can get 30% off with the code THESLEEPYSCIENTIST 🎧 Prefer listening with the screen off? The Sleepy Scientist is also on Spotify: https://open.spotify.com/show/0340wK7... 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...