Annie Jump Cannon was an American astronomer, born on December 11, 1863. She was born in Dover, Delaware but she moved to Cambridge, Massachusetts before she died. Suffering from scarlet fever rendered her nearly deaf, this made it hard for her to socialize and as a result she immersed herself in her work. She was a suffragist and a member of the National Women's party. Known for Stellar classification, she listed nearly 400,000 stars in her contribution to the Draper catalog. She is also known for her speed in classifying stars and ability to draw distinctions in the photographs of Stellar Spectra. She could classify three stars per minute by looking at their special pattern.
In 1922 Cannon's system of classification was adopted by the International