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Leavitt paid work at Harvard College Observatory; gradually loses her hearing (1 gen 1902 anni – 1 gen 1921 anni)
Aggiunto al nastro di tempo:
23 gen 2018
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big history project timeline
Henrietta Leavitt, and Edwin Hubble.
Data:
1 gen 1902 anni
1 gen 1921 anni
~ 19 years