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13 St 1 Sept 1914 Jahr - Parallax program begins

Beschreibung:

The program measured the motion of the stars

Zugefügt zum Band der Zeit:

History of McCormick Observatory

ByMickayla Mabe
7 Feb 2018

Datum:

13 St 1 Sept 1914 Jahr
Jetzt
~ 109 years ago
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