Finding 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.

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FOOTAGE:
The space scenes in this video were captured using SpaceEngine Pro, a virtual universe simulator:
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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.php?curid=31289507

WOH-G64 Torus: By European Southern Observatory - https://www.eso.org/public/images/eso0815a/, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=5169113

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.php?curid=45252612

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.
https://www.youtube.com/c/chriszabriskie/
http://chriszabriskie.com/
- Abandon Babylon (New album from which the songs came: https://chriszabriskie.bandcamp.com/album/abandon-babylon)

Dark Fog by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 licence. https://creativecommons.org/licenses/by/4.0/
Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1300031
Artist: http://incompetech.com/

Ice Demon by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 licence. https://creativecommons.org/licenses/by/4.0/
Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1200061
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/startswithabang/2017/06/10/ask-ethan-why-do-stars-come-in-different-sizes/?sh=249c29e5204a
- Determining Star Radius: https://forums.space.com/threads/how-to-determine-a-stars-radius.27399/
- Metallicity Impact on Stars: http://adsabs.harvard.edu/full/1998A%26A...335..573M
- Red Giant Sun: https://imagine.gsfc.nasa.gov/science/objects/dwarfs1.html
- Stellar Wind Composition: https://www.sciencedaily.com/releases/2019/01/190124141600.htm
- Star Size Limits: https://futurism.com/is-there-a-limit-to-how-large-a-star-can-be
- Parallax Visualisation and Maths: https://www.youtube.com/watch?v=iwlMmJs1f5o
- Canis Majrois: https://www.constellation-guide.com/vy-canis-majoris/
- List of Largest Stars: https://en.wikipedia.org/wiki/List_of_largest_stars

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

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Видео Finding the Largest Star (Stephenson 2-18) канала SEA