The letter classifications for stars date back 120 years. They were based on spectra, but quantum physics wasn't yet discovered. The temperature of a star can change the way that spectrum is classified. A B C D E F G H I G A G E L M N O P became O B A F G K M.
If scientists discovered that we are not alone, what would they do with that information? Neil deGrasse Tyson and Chuck Nice learn about the search for life, habitability around M stars and more with astrophysics professor and author Aomawa Shields.
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https://startalkmedia.com/show/cosmic-queries-life-on-other-planets-with-aomawa-shields/
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Photo Credit: Original ESO/M. Kornmesser (+ background position from original change by Nagualdesign), CC BY 4.0, via Wikimedia Commons
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