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12 feb 1840 anni - Wilhelm Beer and Johann von Maedler determine Mars's rotation period as 24 hours, 37 minutes, and 22.6 seconds.
Descrizione:
*exact date unknown*
Aggiunto al nastro di tempo:
29 gen 2018
0
0
444
Mars Timeline
Data:
12 feb 1840 anni
Adesso
~ 184 years ago
Immagini:
