epoch (Q2703)
moment in time used as a reference point for some time-varying astronomical quantity
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description moment in time used as a reference point for some time-varying astronomical quantity

External Links
(P646) /m/01cdn8
(P1051) 350
(P3417) Geologic-Time-Scale
Epoch
(P8814) 15321930-n
(P8834) epoch
(P10283) C2780317896