4 résultats pour "shapley"
- Shapley, Harlow - astronomie.
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Cosmology - astronomy.
In 1917 American scientist Harlow Shapley measured the distance to several groups of stars known as globular clusters. He measured these distances by using amethod developed in 1912 by American astronomer Henrietta Leavitt. Leavitt’s method relates distance to variations in brightness of Cepheid variables, a class of starsthat vary periodically in brightness. Shapley’s distance measurements showed that the clusters were centered around a point far from the Sun. The arrangement of theclusters was...
- Sciences & Techniques: Grand débat Shapley-Curtis
- Shapley Harlow, 1885-1972, né à Nashville (Missouri), astronome américain.