George Ellery Hale
Born: June 29, 1868
Died: February 21, 1938 (aged 69)
Known for:
- The study of stellar evolution (1908)
- Ten years' work of a mountain observatory (1915)
- The spectra of stars of Secchi's fourth type (1899)
- ROTATION PERIOD OF THE SUN AS
- SPECTRUM OF THE HIGH POTENTIAL