Helping The others Realize The Advantages Of epoch sign in
Epoch vs . equinoxDate-references for coordinate systemsEpochs and intervals of validityChanging the typical equinox and epochSpecifying an epoch or equinoxBesselian yearsJulian decades and J2000Epoch of your daySee alsoReferencesNotesCitationsSourcesFurther readingExternal backlinksThe key use of astronomical quantities specified in by doing this