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:
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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...
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.
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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-...
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Ice Demon by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 licence. https://creativecommons.org/licenses/...
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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
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