.Annie Jump Cannon
, astronomer and suffragette, was born on December 11, 1863 in Dover, Delaware, USA.Oh! Be a fine girl (guy)--kiss me!
This is the traditional mnemonic for the star classification: OBAFGKM. Cannon devised the system and classified nearly a quarter of a million stellar spectra for the Henry Draper catalogue. She said that astronomical spectroscopy made it "almost as if the distant stars had acquired speech."
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