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abstraction > mathematical concept > geometrical object > point > coordinate > equatorial coordinate
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equatorial coordinate comparison table
Subject has right ascension has definition is part of is opposite of is a kind of is an instance of
antapex The direction in the sky away from which the Sun seems to be moving (at a speed of 19.4 km s-1) relative to general field stars in the Galaxy.Columbasolar apex equatorial coordinate
celestial ephemeris pole The reference pole for nutation and polar motion; the axis of figure for the mean surface of a model Earth in which the free motion has zero amplitude. This pole has no nearly diurnal nutation with respect to a space-fixed or Earth-fixed coordinate system.   equatorial coordinate
celestial pole0One of two points at which the Earth's axis of rotation, if extended, would intersect the celestial sphere.  equatorial coordinate 
solar apex A point on the celestial sphere toward which the Sun and the solar system are moving with respect to the local standard of rest at a rate of about 19.4 km per second (about 4.09 AU per year).Herculesantapex equatorial coordinate

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