Explanatory Supplement to the Astronomical AlmanacThe original Explanatory Supplement to the Astronomical Ephemeris and the American Ephemeris and Nautical Almanac was published in 1961 and revised in 1974. In 1981 the series of publications titled The Astronomical Ephemeris and the American Ephemeris and Nautical Almanac were continued under the single title The Astronomical Almanac. Thus, the title of the new edition of the Explanatory Supplement. |
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Informational, but a little boring. JOHNCIENA 4 LIFE
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aberration accuracy adopted angle Annual apparent applied approximately Astron Astronomical Astronomical Almanac axis body calculated calendar catalog celestial century clock computed constant coordinate system coordinates corrections declination defined depends determined difference direction distance dynamical Earth eclipse effects elements ephemeris epoch equator equatorial equinox error expressed Figure formulas frequency fundamental geocentric geodetic given gives Greenwich hour included International Julian known latitude longitude lunar mass mean measured meridian method month Moon motion nutation object observations Observatory obtained orbit origin parallax parameters period phase planet polar pole position precession precision proper motions reference reference frame relative represented respect right ascension rotation satellites sidereal solar standard stars Step surface Table terrestrial theory timescale transformation transit true unit Universal usually values variations vector ܘ ܘ ܘ