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What we perceive to be the edge of our universe is not the actual edge of the universe, with most scientists in agreement that more space lies hidden beyond what we're able to see. Last time out, we travelled to the very edge of our observable universe. But today, we will be going even farther, as we wade out into the darkness of the unobservable universe. Watch Part 1 (Journey to the Edge of the Universe): https://youtu.be/QhM5zAVvOI4 If you use these videos for sleeping, check out the Sleeping Space Playlist! It's a collection of my most chilled out and audible videos, suitable for shuffling. https://youtube.com/playlist?list=PLkoaIad9k4NIlsG6g-almaZH6MzR_T5eV Join my Discord Server: https://discord.com/invite/sea Support the Channel on Patreon: https://www.patreon.com/sea_media Become a channel member on YouTube: https://youtube.com/seaMedia/join Merchandise: https://the-sea-store.creator-spring.com Business Enquiries: SEA.Enquiries@gmail.com Soundtrack by CO.AG Music: https://www.youtube.com/@co.agmusic1823 - Taboo-Inspired Intro Track: https://youtu.be/YA3yfPh38mc - Strange Days Ahead: https://youtu.be/QaGsRzO-2EA - The Last Breath: https://youtu.be/AekcHz0ZdjU - The Monolith: https://youtu.be/XK_iQLGpId0 - ESP Background Track: https://youtu.be/rT2ONCrdtVU - Encounter: https://youtu.be/vxdlSXZvxL0 - Direct Space: https://youtu.be/G7-3crlxDDE - Do You Understand: https://youtu.be/BXmPuHqXUzc - Phonon: https://youtu.be/2Mgk6jem7Zg - Dark Enigma 13: https://youtu.be/mGFxASTdnhc - Book of the Dead: https://youtu.be/6X3RYrOy1RE FOOTAGE: The space scenes in this video were captured using SpaceEngine Pro, a virtual universe simulator: http://spaceengine.org/ Get SpaceEngine on Steam: https://store.steampowered.com/app/314650/SpaceEngine/ Other graphics, including images, videos and visualisations, are public domain content provided by NASA and the ESA. NASA GSFC: https://www.nasa.gov/goddard ESA: https://www.esa.int The Logarithmic Observable Universe Graphic was provided by the following channel: https://www.youtube.com/channel/UCPOu7Xqg4jqrO4o3MZm-Baw Multiple graphic sequences were provided by Vecteezy.com Pro License Holder: https://www.vecteezy.com/members/sea-media-stock SOURCES OF INFORMATION: - Critical Density Definition: https://astronomy.swin.edu.au/cosmos/c/Critical+Density - Old Critical Density Estimates: http://hyperphysics.phy-astr.gsu.edu/hbase/Astro/denpar.html - Our Flat Universe: https://www.symmetrymagazine.org/article/april-2015/our-flat-universe?email_issue=725 - Multiply Connected Shapes: https://mathematica.stackexchange.com/questions/20912/how-to-draw-a-higher-genus-surface - Time in a Toroidal Universe: - Torroidal Universe with Time: https://evolvingsouls.com/blog/toroidal-universe/ - Why the Universe Probably Isn't Shaped Like a Donut [Forbes]: https://www.forbes.com/sites/startswithabang/2021/07/21/why-the-universe-probably-isnt-shaped-like-a-donut/ - ESA Interview with Joseph Silk re the Size & Shape of the Universe: https://www.esa.int/Science_Exploration/Space_Science/Is_the_Universe_finite_or_infinite_An_interview_with_Joseph_Silk - Oxford Estimates for the Size of the Universe: https://arxiv.org/pdf/1101.5476.pdf - Cosmic Inflation & Before the Big Bang [Forbes]: https://www.forbes.com/sites/startswithabang/2020/02/21/these-4-pieces-of-evidence-have-already-taken-us-beyond-the-big-bang/?sh=165a00e87a0b - Primordial Gravitational Waves / GWB: http://www.icg.port.ac.uk/~mikewang/Misc/Tripos/Primordial%20Gravitational%20Waves%20from%20Cosmic%20Inflation.pdf - Dark Energy & Dr. Adam Riess' Quote: https://sciencesprings.wordpress.com/2020/01/14/from-the-new-york-times-have-dark-forces-been-messing-with-the-cosmos-2/ Chapters: 0:00 Welcome Back 1:50 Beyond the Cosmic Horizon 5:42 The Shape of the Universe 7:45 Universal Curvature 12:35 Critically Dense Flat Universe 15:18 Drawing Triangles on the CMB 18:52 The Flatness Problem 22:19 Multiply Connected Universe 27:19 4D Hyper Torus 29:17 Curved on a Large Scale? 31:50 Cosmic Inflation 37:09 Closing Statements (NON-ENGLISH VIEWERS) To get subtitles in another language, click the [CC] button in the bottom right corner of the screen, then click the Settings (cogwheel) icon next to it, click "Subtitles / CC" and click "Auto-Translate", and select your language from there.