// todo need optimize like in event.jsp. Add indexing or not indexing this page. Leavitt discovers 2400 Cepheid variable stars and develops her period-luminosity theory (1 gen 1902 anni – 1 gen 1908 anni) (Il nastro del tempo)
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Leavitt discovers 2400 Cepheid variable stars and develops her period-luminosity theory (1 gen 1902 anni – 1 gen 1908 anni)

Aggiunto al nastro di tempo:

big history project timeline

ByAlia
23 gen 2018

Data:

1 gen 1902 anni
1 gen 1908 anni
~ 6 years
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