Harlow Shapley Scientist

Harlow Shapley (November 2, 1885 – October 20, 1972) was an American astronomer.He used RR Lyrae stars to correctly estimate the size of the Milky Way Galaxy and the sun's position within it. In 1953 he proposed his "liquid water belt" theory, now known as the concept of a habitable zone.

Personal facts

Birth date	November 02, 1885
Birth place	Nashville Missouri
Nationality	United States
Date of death	October 20, 1972
Place of death	Boulder Colorado
Education	Princeton University University of Missouri
Known for	Sun