Helping The others Realize The Advantages Of epoch sign in
Epoch compared to equinoxDate-references for coordinate systemsEpochs and periods of validityChanging the standard equinox and epochSpecifying an epoch or equinoxBesselian yearsJulian yrs and J2000Epoch on the daySee alsoReferencesNotesCitationsSourcesFurther readingExternal backlinksThe most crucial utilization of astronomical quantities laid out