epoch sign in - An Overview
Epoch compared to equinoxDate-references for coordinate systemsEpochs and periods of validityChanging the standard equinox and epochSpecifying an epoch or equinoxBesselian yearsJulian decades and J2000Epoch in the daySee alsoReferencesNotesCitationsSourcesFurther readingExternal backlinksThe most crucial utilization of astronomical portions laid ou