How Do We KNOW What Stars Are Made Of?

If stars are so far away, then how do we know what they're made of? It's absorption spectrum! Even our closest star, the Sun, is way too hot to take a sample, so we have to rely on what the light can tell us.

Nick Lucid - Host/Writer/Editor/Animator
Vanessa R Bradley - Thumbnail
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VIDEO ANNOTATIONS/CARDS

How do we know the Universe is expanding?
   • How do we know the Universe is expand...  

How Do We Know Things About Stars?
   • Basics of Hertzsprung-Russell (HR) Di...  

Why Are Some Things Transparent?
   • Why Are Some Things Transparent?  
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HUGE THANK YOU TO THESE PATRONS

** Andy Kirkham, Nikko Lai, Clint Cloys, Rick Finn, Evgeny, Preston From, Christian McCracken **
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OTHER SOURCES

http://www.bbc.com/earth/story/201601...
http://hyperphysics.phy-astr.gsu.edu/...
http://hyperphysics.phy-astr.gsu.edu/...
http://physics.nist.gov/PhysRefData/A...
https://archive.org/details/WilhelmSc...
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LINKS TO COMMENTS

Redshift - PapaKay:
   • How do we know the Universe is expand...  

Redshift - Davis1118:
   • How do we know the Universe is expand...  

Magenta Correction - Alberto Torres:
   • How do we know the Universe is expand...  
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IMAGE CREDITS

Fraunhofer:
https://commons.wikimedia.org/wiki/Fi...

Astronaut:
https://commons.wikimedia.org/wiki/Fi...