What Happens If You Fall Into a Black Hole? (Comet's Ball and the Hole in the Sky)

The closest known black hole, Gaia BH1, is about 1,560 light-years away. Let's fall into it, step by step, with real physics. On the way you'll find out what a black hole really is (and isn't), how we found one we can't see, why a small black hole would tear you apart before you even reach its edge while a giant one lets you cross in one piece, why physicists picture space itself flowing into a black hole like a river, how your phone's GPS shows that gravity slows time, and why, once you're inside, the centre isn't in front of you but in your future. Three things to remember: 1. A black hole is a place where escaping would take more than the speed of light. 2. Its edge is where space falls inward at the speed of light (and faster inside it): a point of no return you wouldn't even feel. 3. The bigger the black hole, the gentler its edge, and even the biggest ones fade away. Chapters 0:00 The nearest black hole 0:22 What a black hole really is 1:10 How we found Gaia BH1 1:43 Why small black holes are deadlier 2:20 Sagittarius A* and the river of space 3:26 Gravity slows time (and your GPS knows it) 3:59 What's inside? The centre is in your future 4:33 Do black holes last forever? 5:16 Three things to remember Sources & further reading Gaia BH1 discovery: El-Badry et al., MNRAS 2023 (announced 2022) Sagittarius A* image: Event Horizon Telescope Collaboration, 2022 The "river model" of black holes: Hamilton & Lisle, American Journal of Physics, 2008 Hawking radiation: S. W. Hawking, "Black hole explosions?", Nature, 1974 GPS and relativity: Ashby, "Relativity in the Global Positioning System", Living Reviews in Relativity, 2003 Credits Black hole image (Sagittarius A*, 2022): EHT Collaboration, CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) Music: original score. Piano: "Salamander Grand Piano V3" by Alexander Holm, licensed under CC BY 3.0 (https://creativecommons.org/licenses/by/3.0/) Samples (CC0): VS Chamber Orchestra: Community Edition (Versilian Studios), Versilian Community Sample Library (Versilian Studios)