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15 mar 1868 año - Henrietta Swan Leavitt (1868 -1921) Va descobrir que les cefeides de major lluminositat intrínseca tenien llargs períodes (1912)
Añadido al timeline:
Científics de l'Univers de Maria Dotú (1r btx A)
By
Maria D
7 ene 2018
0
0
357
fecha:
15 mar 1868 año
Ahora mismo
~ 156 years ago
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