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. Did you know that the places where the planets formed in the solar system aren't necessarily where they've ended up today? Planets can MIGRATE. And it's that migration that throws the rest of the Solar System into a complete mess, especially when something as massive as Jupiter is moving... TRAPPIST-1 resonance music: https://www.youtube.com/watch?v=WS5UxLHbUKc Check out this blog post from the Planet Hunter's citizen science project for more information on planet migration in the solar system: https://blog.planethunters.org/2014/05/09/the-role-of-planetary-migration-in-the-evolution-of-the-solar-system/ If you want more of an academic read, check out this review paper on planet migration by Kley & Nelson from 2012: https://arxiv.org/pdf/1203.1184.pdf ---- 📚 "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/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/ --- 🔭 Royal Astronomical Society podcast that I’m co-hosting 😱 🥳- podfollow.com/supermassive --- 🔔 Don't forget to subscribe and click the little bell icon to be notified when I post a new video! -- 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 --- 👩🏽‍💻 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/