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Jahr (\(\rm a\))
Umlaufzeit (\(T\))
Halbwertszeit (\(T\))
Lebensdauer (\(\tau\))
Schwingungsdauer (\(T\))
Zeit (\(t\))
\(\rm 1\,a=3.154\cdot 10^{7}\,s\)
Base?
SI?
Metric?
Coherent?
Imperial?