epoch sign in for Dummies
Epoch vs . equinoxDate-references for coordinate systemsEpochs and periods of validityChanging the common equinox and epochSpecifying an epoch or equinoxBesselian yearsJulian several years and J2000Epoch with the daySee alsoReferencesNotesCitationsSourcesFurther readingExternal linksThe primary utilization of astronomical portions laid out in using