Google is paying homage with a Google Doodle to American astronomer Annie Jump Cannon. She was born on December 11, 1863. Cannon worked with Harvard Observatory director Edward Pickering, making her one of “Pickering’s Women” – a team of female assistants who helped classify hundreds of thousands of stars.
One of Cannon’s most notable contributions was the creation of the “O, B, A, F, G, K, M” scheme, a way of classifying stars into seven specific spectral classes. “To help remember, and teach future astronomers her classification system, Cannon created the mnemonic device ‘Oh be a fine girl – kiss me!’”