Annie Jump Cannon

Oh! Be a fine girl (guy)--kiss me! This is the traditional mnemonic for the way stars are classified: OBAFGKM. Cannon was the astronomer and suffragist who devised the classification system and who said that astronomical spectroscopy made it "almost as if the distant stars had acquired speech." She classified about a quarter of a million star spectra for the Henry Draper catalog.

Annie Cannon - photograph