What if the universe decided to turn against Earth? In this compilation, we explore what happens if two moons collide, a rogue planet enters our solar system, or a magnetar hits a black hole. From cosmic collisions to the ultimate fate of the universe, how long would humanity survive if the impossible became reality? Welcome to the ultimate space science and astronomy deep dive. We analyze 10 of the most terrifying universe-ending scenarios, cosmic apocalypses, and planet-destroying events based on real physics and theoretical astronomy. 00:00 What If The Space Station Fell From the Sky? 22:37 What If Earth Had Two Moons on a Collision Course? 26:17 What If Earth Got Hit by an Interstellar Object? 43:31 What If Another Planet SMASHED Into Earth at 60 km/s? 47:32 Earth Becomes a Moon: What If Saturn Took Over? 1:04:35 What If Planet X Entered Our Solar System? 1:20:24 What If a Magnetar Collided With a Black Hole? 1:24:21 What If You Lived Through the Milkdromeda Galaxy Collision? 1:47:19 What If The Largest Objects in the Universe Collided? 2:04:23 What If The Universe Stopped Expanding and Started Shrinking? 👍 Enjoyed the video? Hit LIKE and comment below: Which cosmic apocalypse scenario scares you the most? Dive even deeper into the world of science and discovery with Popular Science, the free streaming channel bringing you more of what you love from What If, plus epic explorations in engineering, rocket launches, movies, space, and Earth sciences https://underknown.com/popularscience/ Support us on Patreon: https://www.patreon.com/whatifshow/membership Check out our other channels: How to Survive: https://bit.ly/how-to-survive-show Animalogic: https://www.youtube.com/@UCwg6_F2hDHYrqbNSGjmar4w Aperture: https://bit.ly/aperture-show T-shirts and merch: http://bit.ly/whatifstore What If elsewhere: Instagram: http://bit.ly/whatif-instagram Discord: https://discord.gg/Bj5UnspbwE Podcast: http://bit.ly/yt-what-if-show-podcast What If is a mini-documentary web series that takes you on an epic journey through hypothetical worlds and possibilities. Join us on an imaginary adventure through time, space and chance while we (hopefully) boil down complex subjects in a fun and entertaining way. Contact us at https://underknown.com/contact/ NUGABYMSNFFFZU7D 0GWVSHHOVSTAV0ZL 9AY5EFPHMA2FZLLF #whatif #science #earth #universe #cosmos