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The Largest Star (Stephenson 2-18)

Stars come in a wide range of sizes, but how do we calculate a star's size to determine which is the biggest? In this episode of OOTW, we will find out how stars are measured to determine their mind-blowing sizes, and above all, which of them are the largest stars. You can now support me on Patreon:   / sea_media   Patrons get ad-free access to my videos, and also get early access sneak peaks! Alternatively, you can become a channel member through YouTube: https://youtube.com/seaMedia/join All support is hugely appreciated and helps me in my full-time job of creating these videos! Do you use these videos to sleep or for night time watching? Check out the new sleeping space playlist, a collection of my most chilled out and ambient videos.    • Sleeping Space Playlist   Join the official #SeaSquad Discord Server:   / discord   Business Enquiries: [email protected] Thumbnail made by Wimptastic:   / wimptastical   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/31... Stock footage provided by Videezy.com Canis Majoris Nebula By Judy Schmidt - Flickr: VY Canis Majoris Ejecta Shell, CC BY 2.0, https://commons.wikimedia.org/w/index... WOH-G64 Torus: By European Southern Observatory - https://www.eso.org/public/images/eso..., CC BY 4.0, https://commons.wikimedia.org/w/index... Canis Majoris Optical and Infrared: By ESO/Digitized Sky Survey 2. Acknowledgement: Davide De Martin - ESO website, CC BY 4.0, https://commons.wikimedia.org/w/index... MUSIC: Two songs in this video were made by Chris Zabriskie. His music is absolutely fantastic and makes videos 10x better. He's just released a new album, so if you liked the music in this video, please consider checking out his YouTube channel and website.    / chriszabriskie   http://chriszabriskie.com/ Abandon Babylon (New album from which the songs came: https://chriszabriskie.bandcamp.com/a...) Dark Fog by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 licence. https://creativecommons.org/licenses/... Source: http://incompetech.com/music/royalty-... Artist: http://incompetech.com/ Ice Demon by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 licence. https://creativecommons.org/licenses/... Source: http://incompetech.com/music/royalty-... Artist: http://incompetech.com/ All other music provided by the YouTube Audio Library SOURCES: Why Do Stars Vary in Size: https://www.forbes.com/sites/startswi... Determining Star Radius: https://forums.space.com/threads/how-... Metallicity Impact on Stars: http://adsabs.harvard.edu/full/1998A%... Red Giant Sun: https://imagine.gsfc.nasa.gov/science... Stellar Wind Composition: https://www.sciencedaily.com/releases... Star Size Limits: https://futurism.com/is-there-a-limit... Parallax Visualisation and Maths:    • Stellar parallax and measuring distance   Canis Majrois: https://www.constellation-guide.com/v... List of Largest Stars: https://en.wikipedia.org/wiki/List_of... TIMESTAMPS: 0:00 Introduction 1:04 What Are Stars? 5:40 How Stars Become Huge 9:38 Problems with Direct Measurements 11:31 Parallax 13:01 Indirectly Measuring Stars 15:33 VY Canis Majoris 18:30 UY Scuti 22:59 Stephenson 2-18 Want to support the channel? Now you can become a SeaSquad member! Members gain access to exclusive badges, emojis, and early video previews! https://www.youtube.com/sea1997/join