New Step by Step Map For epoch sign in
Epoch as opposed to equinoxDate-references for coordinate systemsEpochs and periods of validityChanging the typical equinox and epochSpecifying an epoch or equinoxBesselian yearsJulian a long time and J2000Epoch of your daySee alsoReferencesNotesCitationsSourcesFurther readingExternal inbound linksThe most crucial use of astronomical quantities lai