Celebrating Annie Jump Cannon's 151 birthday.

Annie Jump Cannon (December 11, 1863 - April 13, 1941) was an American astronomer whose cataloging work was instrumental in the development of contemporary stellar classification. With Edward C. Pickering, she is credited with the creation of the Harvard Classification Scheme, which was the first serious attempt to organize and classify stars based on their temperatures. She was almost completely deaf throughout her career.

http://en.wikipedia.org/wiki/Annie_Jum…