Stellar Spectral Classification

Here we learn what the dark lines in the spectra of stars mean, and the history behind their understanding. There were big audio issues with the original recording. This is the best remaster I could do without making the sound bad...
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OBAFGKM Classification: en.wikipedia.org/wiki/Stellar...
Wien's Law: en.wikipedia.org/wiki/Wien%27...
Kirchhoff's three laws of spectroscopy: en.wikipedia.org/wiki/Gustav_...
Edward Charles Pickering: en.wikipedia.org/wiki/Edward_...
Williamina Fleming: en.wikipedia.org/wiki/William...
Annie Jump Cannon: en.wikipedia.org/wiki/Annie_J...
Henry Draper Catalogue: en.wikipedia.org/wiki/Henry_D...
Cecilia Payne-Gaposchkin: en.wikipedia.org/wiki/Cecilia...
Stellar Atmospheres; a Contribution to the Observational Study of High Temperature in the Reversing Layers of Stars.: adsabs.harvard.edu/abs/1925PhD...
Sloan Digital Sky Survey Sample Spectra, Data Release 5: classic.sdss.org/dr5/algorithm...
T dwarf spectrum: Burgasser, et al, 2006: arxiv.org/pdf/astro-ph/051009...
Here was the original recording to see what I had to deal with: • Stellar Spectral Class...

[@scottbruner9266]

11:11

[@spook_dad]

the Henry Daper colour chart for planet spectra you showed