Saturday, 12 April 2014

Astronomy Scrapbook Sunday 13th April 2014

On This Day
13th April 1941 death of Annie Jump Cannon


An American astronomer, Annie Jump Cannon worked with Edward Pickering at Harvard cataloging stellar spectra . Although being nearly deaf, she was responsible for dividing the stars into stellar classes, which today we know as OBAFGKM on the HR Diagram. In addition she discovered 300 variable stars and 5 novae.

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