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1 Jan 1967 Jahr - Seconds - A Second is formally defined not trough movements of celestial bodies but as 9,192,631,770 vibrations of the cesium atom.
Zugefügt zum Band der Zeit:
Maths - History of time
By
Charlotte Best
21 Nov 2019
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0
295
Datum:
1 Jan 1967 Jahr
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~ 57 years ago
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