5 Easy Facts About epoch sign in Described
Epoch compared to equinoxDate-references for coordinate systemsEpochs and periods of validityChanging the conventional equinox and epochSpecifying an epoch or equinoxBesselian yearsJulian years and J2000Epoch of the daySee alsoReferencesNotesCitationsSourcesFurther readingExternal back linksAstronomical quantities might be specified in any of many