New evidence AGAINST dark matter?!

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Dr. Becky
Published at : 29 Jan 2021
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A research study was recently published with evidence in favour of an alternate theory of gravity that doesn't need dark matter. Let's take a look shall we?! To learn more about dark matter 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.

All animations by Megan Smethurst Graphic Design: https://megansmethurstdesign.wixsite.com/website

Read the research study here: Chae et al. (2020) - https://iopscience.iop.org/article/10.3847/1538-4357/abbb96

Check out my previous video on all the evidence we have for dark matter from the past century: https://youtu.be/nbE8B7zggUg
And this one where I look at the other possible alternate theories of gravity: https://youtu.be/dtfEzDAlL5k

00:00 - Introduction
01:34 - MOND recap
02:02 - Rotation curves of galaxies
03:49 - Problems with MOND
05:17 - The Equivalence Principle
06:48 - The External Field Effect (EFE)
07:11 - Evidence for EFE
08:20 - What does this mean for dark matter?
10:54 - Bloopers!

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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, with some beautiful illustrations): https://www.penguinrandomhouse.com/books/635406/space-at-the-speed-of-light-by-dr-becky-smethurst/

📚 German translation "Das kleine Buch vom großen Knall" : https://www.dtv.de/buch/becky-smethurst-das-kleine-buch-vom-grossen-knall-28254/

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

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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-asteroids

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👩🏽‍💻 I'm Dr Becky Smethurst, an astrophysicist at the University of Oxford. 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
astronomyastrophysicsspace

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