A white hole is the opposite of a black hole, spewing out matter. So was the Big Bang a white hole? To learn more of the basics on general relativity and cosmology head to https://brilliant.org/drbecky

Penrose (1974) - http://articles.adsabs.harvard.edu/pd...

00:00 - What are white holes?
01:16 - What are singularities?
03:19 - The singulairty in the early universe
04:45 - How come the universe wasn't trapped in a black hole?
06:19 - The difference between the Big Bang and a white hole singularity.
09:35 - So what is the Big Bang?
11:11 - A Grand Unified Theory: THE DREAM



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🎧 Royal Astronomical Society Podcast that I co-host: podfollow.com/supermassive

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📚 "Space: 10 Things You Should Know" - UK Edition: http://bit.ly/SpaceDrBecky

📚 US & Canada version: "Space at the speed of light" (same book, different title, with some beautiful illustrations): https://www.penguinrandomhouse.com/bo...

📚 German translation "Das kleine Buch vom großen Knall" : https://www.dtv.de/buch/becky-smethur...

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👩🏽‍💻 I'm Dr Becky Smethurst, an astrophysicist at the University of Oxford (Christ Church). I love making videos about science with an unnatural level of enthusiasm. I like to focus on how we know things, not just what we know. And especially, the things we still don't know. If you've ever wondered about something in space and couldn't find an answer online - you can ask me! My day job is to do research into how supermassive black holes can affect the galaxies that they live in. In particular, I look at whether the energy output from the disk of material orbiting around a growing supermassive black hole can stop a galaxy from forming stars.

http://drbecky.uk.com
https://rebeccasmethurst.co.uk