Ele Willoughby, PhD on Nostr: Day 11 #ArtAdventCalendar: Happy birthday to trailblazing US #astronomer Annie Jump ...

Day 11 #ArtAdventCalendar: Happy birthday to trailblazing US #astronomer Annie Jump Cannon (1863 – 1941), here with her stellar classification system which sorted stars based on spectral types, revealing their temperature from hot blue to cool red stars: O,B,A, F, G, K & M. Named the Harvard Classification after the university, her tremendous contribution was less visible.
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