New Step by Step Map For epoch sign in
Epoch versus equinoxDate-references for coordinate systemsEpochs and durations of validityChanging the standard equinox and epochSpecifying an epoch or equinoxBesselian yearsJulian years and J2000Epoch from the daySee alsoReferencesNotesCitationsSourcesFurther readingExternal linksThe principle utilization of astronomical portions specified in this