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nutation

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nutation
nutation (njuːˈteɪʃən) [ad. L. nūtātiōn-em, noun of action f. nūtāre to nod. So F. nutation, It. nutazione, Sp. nutacion.] 1. The action of nodding the head; an instance of this. Also transf.1612 Cotta Disc. Dang. Pract. Phys. i. v. 42 The nutation and staggering of nature doth make warie proceeding... Oxford English Dictionary
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Nutation (disambiguation)
astronomical nutation). the ilia The same as precession in spacecraft dynamics Nutation (engineering) wikipedia.org
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Nutation (botany)
Simple nutation occurs in flat leaves and flower petals, caused by unequal growth of the two sides of the surface. References External links Nutation in plants wikipedia.org
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circumnutation
circumnutation Bot. (ˌsɜːkəmnjuːˈteɪʃən) [n. of action from prec.: see nutation.] A movement characteristic of growing plants, due to increased growth at different points round the axis in succession, whereby the growing part (e.g. the apex of a stem) describes a more or less circular spiral path. (... Oxford English Dictionary
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Nutation (engineering)
Nutation has also been used in drive systems for gearboxes, with proposed uses including helicopter rotors, seat recliners and a European Space Agency wikipedia.org
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nutational
nutational, a. (njuːˈteɪʃənəl) [f. nutation + -al.] Of or pertaining to nutation.1881 W. D. Hay 300 Years Hence viii. 152 The precessional and nutational movements of the earth. 1959 Van Lear & Lassen in Puckett & Ramo Guided Missile Engin. x. 275 If the gyro is started up with the inner gimbal init... Oxford English Dictionary
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Astronomical nutation
Earth's nutation Precession and nutation are caused principally by the gravitational forces of the Moon and Sun acting upon the non-spherical figure of The maximum radius of this ellipse is the constant of nutation, approximately 9.2 arcseconds. Smaller effects also contribute to nutation. wikipedia.org
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Equinox (celestial coordinates)
Nutation Nutation is the oscillation of the ecliptic plane. It was first observed by James Bradley as a variation in the declination of stars. The period of oscillation of the nutation is 18.6 years. wikipedia.org
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Precession (disambiguation)
Precession refers to a specific change in the direction of the rotation axis of a rotating object, in which the second Euler angle (angle of nutation) reference axis of the pole's average location over the year 1900 Great year, the time required for one complete cycle of the precession of the equinoxes Nutation wikipedia.org
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Flip angle
In magnetic resonance imaging, the flip angle, also called the nutation angle, pulse angle, tip angle, or excitation angle, refers to the angle that the wikipedia.org
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章动
Mai 2006，《现代天文现象学》） 外部连结 陀螺的章动 "The Tables of Differences Between the Nutation Series IAU2000, IERS1996 and IAU1980" Präzession und Nutation eines Luftkissenkreisels - Simulation der Erdachsenbewegung Präzession und Nutation - Beschreibung mit schönen Grafiken 极运动と木村のZ项 、チャンドラー极运动の谜 —日本测地学会CD-ROMテキスト测地学Web版 天体力学 wikipedia.org
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The application of Bayesian method in determination of free core ...
Thedifficulty in the determination of Free Core Nutation （FCN） parameters （periodandqualityfactor）using high precision gravity technique is due to the low signal-to-noise ratio of ...
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August Ludwig Busch
He reduced a series of long-term observations made by James Bradley in England from 1727 to 1747 to obtain constants relating to nutation. References External links Reduction of the observations made by Bradley at Kew and Wansted, to determine the quantities of aberration and nutation ( wikipedia.org
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Tempo (astronomy)
Dispersion of the pulses in the Interstellar medium, the solar system, and the ionosphere Observatory motion (including Earth rotation, precession, nutation the IAU 1991 and 2000 resolutions and hence uses the International Celestial Reference System, Barycentric Coordinate Time and up-to-date precession, nutation wikipedia.org
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Polar circle
This predominant, average tilt of the Earth varies slightly, a phenomenon described as nutation. A further global factor for this numerical range is Earth's nutation, which is a very small change in tilt. wikipedia.org
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