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nutation    
n. 垂头,下垂,俯下,章动

垂头,下垂,俯下,章动

nutation
n 1: uncontrolled nodding


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  • Nutation - Wikipedia
    Nutation (from Latin nūtātiō ' nodding, swaying ') is a rocking, swaying, or nodding motion in the axis of rotation of a largely axially symmetric object, such as a gyroscope, planet, or bullet in flight, or as an intended behaviour of a mechanism
  • Nutation | Definition, Causes, Period, Facts | Britannica
    nutation, in astronomy, a small irregularity in the precession of the equinoxes Precession is the slow, toplike wobbling of the spinning Earth, with a period of about 25,772 years Nutation (Latin nutare, “to nod”) superimposes a small oscillation, with a period of 18 6 years and an amplitude of 9 2 seconds of arc, upon this great slow
  • 6. 8: Nutation - Physics LibreTexts
    Those who have studied the gyrations of a spinning top will recall that, in addition to precessing, a top may nutate, or nod up and down (Latin nutare, to nod), the amplitude and type of nutation depending on the initial conditions Earth’s axis does indeed nutate, but not from the same cause
  • Nutation and Precession - NASA
    Nutation and precession are the periodic and long-term motion of the Earth's spin axis in space The direction of the Earth's axis in space, shown in orange, changes over time with respect to extremely distant objects, such as quasars
  • Nutation - NASA
    nutation Definition Nutation is the short-period oscillations in the motion of the pole of rotation of a freely rotating body that is undergoing torque from external gravitational forces Nutation of the Earth’s pole is discussed in terms of components in obliquity and longitude
  • What Is Nutation? - AllTheScience
    The tidal forces of sun and moon on the Earth are the principal sources of its continuously changing location, causing a nutation of the Earth's axis The moon has the largest pull, as Earth's nutation cycles coincide with the precession of the orbital nodes of the moon
  • Nutation | Description, Example Application - Your Physicist
    Nutation is a small, oscillatory movement of an object around a fixed point or axis It is a common phenomenon observed in various systems, including celestial bodies, mechanical systems, and biological organisms
  • NUTATION Definition Meaning - Merriam-Webster
    The meaning of NUTATION is the act of nodding the head the act of nodding the head; oscillatory movement of the axis of a rotating body (such as the earth) : wobble… See the full definition
  • Astronomical nutation - Wikipedia
    Although they are caused by the same effect operating over different timescales, astronomers usually make a distinction between precession, which is a steady long-term change in the axis of rotation, and nutation, which is the combined effect of similar shorter-term variations
  • What does NUTATION mean? - Definitions. net
    Nutation (from Latin nūtātiō 'nodding, swaying') is a rocking, swaying, or nodding motion in the axis of rotation of a largely axially symmetric object, such as a gyroscope, planet, or bullet in flight, or as an intended behaviour of a mechanism





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