lunar nutation

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lunar nutation [′lü·nər nü′tā·shən]

(astronomy)

A nodding motion of the earth's axis caused by the inclination of the moon's orbit to the ecliptic; it can displace the celestial pole by 9 seconds of arc from its mean position and has a period of 18.6 years.

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No references found			lunar atmospheric tide lunar caustic lunar crater lunar crust lunar day lunar dust lunar eclipse lunar ephemeris lunar excursion module lunar exploration lunar flight lunar geology lunar inequality lunar interval lunar libration lunar magnetic field lunar mass lunar meteoroid lunar module lunar month lunar mountain Lunar New Year lunar node lunar nodule lunar noon lunar nutation lunar orbit Lunar Orbiter lunar polarization lunar pole lunar probe lunar rainbow lunar rock lunar satellite Lunar Self-Propelled Vehicle lunar spacecraft lunar tide lunar time lunar topology Lunar Year lunarite lunate lunate bar lunatic lunatic fringe lunation Lunceford, Jimmie Lund Lund Astronomical Institute Lund Simula Lund Software House AB			lunar meteoroid Lunar method Lunar Mission Scenario lunar module lunar module lunar module Lunar Module Ascent Engine Lunar Module Engine Lunar Module Pilot Lunar Module Simulator lunar modules lunar modules lunar month lunar month lunar month lunar months lunar months lunar months lunar mountain Lunar Navigation and Communication Infrastructure Lunar Neutron Probe Experiment Lunar New Year Lunar New Year Festival Lunar node Lunar node Lunar nodes lunar nodule Lunar nomenclature Lunar nomenclature lunar noon lunar nutation Lunar observation lunar observations Lunar Observations Verifier Editor Lunar Observer Laser Altimeter Lunar occultation Lunar occultation Lunar occultation Lunar orbit Lunar orbit Lunar Orbit and Landing Approach Lunar Orbit Capture Lunar Orbit Insertion Lunar Orbit Staging Facility Lunar Orbital Prospector Lunar Orbital Rendezvous Lunar Orbiter Lunar Orbiter Image Recovery Project Lunar Orbiter Photographic Atlas of the Moon Lunar Orbiter program Lunar Personnel Lander Lunar phase Lunar phase Lunar phase Lunar phase Lunar Piloted Vehicle lunar polarization lunar pole Lunar Portable Magnetometer Lunar Precursor Robotic Program lunar probe

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