Cannon A

When1:  1911

When2:  1914

Who:    Annie Jump Cannon [Cannon, Annie Jump]

What:   astronomer

Where:  USA

works\  Henry Draper Catalog [1914]

Detail: She lived 1863 to 1941, cataloged many stars, and invented star spectral classification system: O, B, A, F, G, K, and M.

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