Hupenwikipediaorgwikinuta8onearth earths precession

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Unformatted text preview: is called a free nuta0on. hUp:// Earth Nuta8on •  In the case of Earth, the principal sources of 8dal force are the Sun and Moon, which con8nuously change loca8on rela8ve to each other and thus cause nuta8on in Earth's axis. The largest component of Earth's nuta8on has a period of 18.6 years, the same as that of the precession of the Moon's orbital nodes. hUp:// Earth’s Precession •  In astronomy, "precession" refers to any of several slow changes in an astronomical body's rota8onal or orbital parameters, and especially to the Earth precession of the equinoxes. •  Axial precession is the movement of the rota8onal axis of an astronomical body, whereby the axis slowly traces out a cone. In the case of the Earth, this type of precession is also known as the precession of the equinoxes or precession of the equator. The Earth goes through one such complete precessional cycle in a period of approximately 26,000 years, during which the posi8ons of...
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