For Day 21 of @spacetober_challenge #spacetober_challenge prompt star: 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. 🧵1/
#printmaking #womenInSTEM #histsci #DisabledInSTEM #linocut #mastoArt


