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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 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
  • 6. 8: Nutation - Physics LibreTexts
    This brief account may suffice for most purposes of the observational astronomer and for the aim of this chapter, which is a general overview of the celestial sphere A more thorough and detailed treatment of precession and nutation will have to wait for a special chapter devoted to the subject
  • 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
  • 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 and Precession | Earth
    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
  • 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
  • Nutation and Counternutation | Serola Biomechanics
    Regardless of the position of the pelvis in the cardinal planes, the position of the sacrum and spine relative to the ilium and legs is defined within the context of nutation counternutation
  • 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
  • Nutation Explained
    Nutation 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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