How big is the Universe? | *THE* Great Debate in Physics

Go to http://brilliant.org/DrBecky and sign up for free. The first 200 people that go to that link will get 20% off the annual premium subscription. Dubbed "The Great Debate" in 1920 between two giants of astronomy, Herber Curtis and Harlow Shapley, this debate was all about the biggest question there ever has been: how big is the entire Universe?

The video I did with Joe Scott on the crisis in cosmology:    • Why Scientists Can't Agree On The Age...  

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The artwork in the background is a scientifically accurate map showing the orbits of more than 18000 asteroids in the Solar System, created by Eleanor Lutz. Find out more and buy one here: https://eleanorlutz.com/mapping-18000...

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🔔 Don't forget to subscribe and click the little bell icon to be notified when I post a new video!

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

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

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

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🔭 Royal Astronomical Society podcast that I’m co-hosting 😱 🥳- podfollow.com/supermassive

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📹 Dr. Becky also presents videos on Sixty Symbols:    / sixtysymbolsand   Deep Sky Videos:    / deepskyvideos  

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👩🏽‍💻 Dr Becky Smethurst is an astrophysicist researching galaxies and supermassive black holes at Christ Church at the University of Oxford.
http://drbecky.uk.com
https://rebeccasmethurst.co.uk