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Definitions of precession
  1. noun
    the act of preceding in time or order or rank (as in a ceremony)

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  2. noun
    the motion of a spinning body (as a top) in which it wobbles so that the axis of rotation sweeps out a cone
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Definition that contains precession
  • platonic year time required for one complete cycle of the precession of the equinoxes, about 25,800 years
  • precession of the equinoxes a slow westward shift of the equinoxes along the plane of the ecliptic caused by precession of the Earth's axis of rotation
  • hipparchus Greek astronomer and mathematician who discovered the precession of the equinoxes and made the first known star chart and is said to have invented trigonometry (second century BC)
  • great year time required for one complete cycle of the precession of the equinoxes, about 25,800 years
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