Visit http://brilliant.org/DrBecky/ to get started learning STEM for free, and the first 200 people will get 20% off their annual premium subscription. In this video: how realistic is a giant comet impacting with Earth in just 6 months? Don't Look Up is available to watch on Netflix: https://www.netflix.com/ For more information on NASA's DART mission to redirect an asteroid see: https://www.youtube.com/watch?v=EMPSjOAgNmI and this NASA page: https://www.nasa.gov/planetarydefense/dart/ Watch more astrophysicist reacts videos with this playlist:    • Astrophysicist reacts...   00:00 - Mining a comet 37:30 - Introduction 01:39 - Control desk in the telescope dome 02:43 - Lasers and adaptive optics 03:44 - Subaru Telescope & Planet 9 04:49 - Discovery using blink vs static images 05:43 - Display screens and FITS images 07:16 - What would Carl Sagan do? 08:32 - Planetary Defence Coordination Office 09:10 - Sizes of dangerous asteroids/comets 09:43 - Is 6 months warning realistic? 11:05 - Can this information be "classified"? 12:14 - Science is a different language 12:57 - Could the government hide something like this? 14:57 - Supernova searches 16:46 - The nuclear option for destroying dangerous comets 18:34 - "Don't Look Up" frustration boils over 20:20 - A comet with two tails 21:51 - It actually happened?! 22:19 - THAT ending 23:02 - Final thoughts 25:10 - Bloopers --- 👕 Check out my merch here: https://teespring.com/stores/dr-becky --- 📚 "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/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 co-host: podfollow.com/supermassive --- 🔔 Don't forget to subscribe and click the little bell icon to be notified when I post a new video! --- 👩🏽‍💻 I'm Dr Becky Smethurst, an astrophysicist at 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/