The Greatest Guide To epoch sign in
Epoch versus equinoxDate-references for coordinate systemsEpochs and intervals of validityChanging the typical equinox and epochSpecifying an epoch or equinoxBesselian yearsJulian a long time and J2000Epoch on the daySee alsoReferencesNotesCitationsSourcesFurther readingExternal linksThe leading utilization of astronomical quantities laid out in in