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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
  • 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 | 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
  • What Is Nutation? A Simple Definition and Explanation
    Nutation is best described as a nodding or swaying motion of a spinning object’s axis of rotation When a body spins, its rotational axis does not always point in a fixed direction; instead, it undergoes a small, periodic oscillation
  • 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 Definition Meaning - Merriam-Webster
    These also included precession and nutation, phenomena usually observed only through global networks of large radio telescopes Georgina Jedikovska, Interesting Engineering, 4 Sep 2025 These changes are caused by wobbles in Mars’ rotation called nutations
  • What Is Nutation How Does It Change The Climate
    Nutation, derived from the Latin term "nūtātiō" meaning "nodding," refers to a small rocking, swaying, or nodding motion in the axis of rotation of objects like planets or gyroscopes
  • Astronomical nutation - Wikipedia
    Nutation was discovered by James Bradley from a series of observations of stars conducted between 1727 and 1747 These observations were originally intended to demonstrate conclusively the existence of the annual aberration of light, a phenomenon that Bradley had unexpectedly discovered in 1725–6
  • What Is Nutation? - AllTheScience
    Nutation is a word derived from the Latin nutare meaning to nod It means a nodding, swaying, or rocking motion in an axis of rotation The rotation may be of a symmetrical object, such as a bullet in flight or a gyroscope
  • 5. 9: Precession and Nutation - Physics LibreTexts
    Due to the action of a second force (with associated torque), the angle between the angular momentum vector and the fixed axis (which we’ll call the z-axis) may also change, a process known as nutation





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