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13 ore 1 sett 1914 anni - Parallax program begins

Descrizione:

The program measured the motion of the stars

Aggiunto al nastro di tempo:

History of McCormick Observatory

ByMickayla Mabe
7 feb 2018

Data:

13 ore 1 sett 1914 anni
Adesso
~ 109 years ago
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