Matches in DBpedia 2016-04 for { ?s ?p "In astronomy, equinox is a moment in time at which the vernal point, celestial equator, and other such elements are taken to be used in the definition of a celestial coordinate system. The position at other equinoxes can be computed by taking into account precession, nutation and aberration, which directly affect e.g. right ascension and declination.In contrast \"epoch\" is a moment in time for which a given position of an astronomical object is valid."@en }
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- Equinox_(celestial_coordinates) comment "In astronomy, equinox is a moment in time at which the vernal point, celestial equator, and other such elements are taken to be used in the definition of a celestial coordinate system. The position at other equinoxes can be computed by taking into account precession, nutation and aberration, which directly affect e.g. right ascension and declination.In contrast \"epoch\" is a moment in time for which a given position of an astronomical object is valid.".