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  2. Axial precession - Wikipedia

    en.wikipedia.org/wiki/Axial_precession

    In astronomy, axial precession is a gravity-induced, slow, and continuous change in the orientation of an astronomical body's rotational axis. In the absence of precession, the astronomical body's orbit would show axial parallelism. [2] In particular, axial precession can refer to the gradual shift in the orientation of Earth's axis of rotation ...

  3. Precession - Wikipedia

    en.wikipedia.org/wiki/Precession

    The torque-free precession rate of an object with an axis of symmetry, such as a disk, spinning about an axis not aligned with that axis of symmetry can be calculated as follows: [1] = ⁡ where ω p is the precession rate, ω s is the spin rate about the axis of symmetry, I s is the moment of inertia about the axis of symmetry, I p is moment ...

  4. Milankovitch cycles - Wikipedia

    en.wikipedia.org/wiki/Milankovitch_cycles

    Axial precession is the trend in the direction of the Earth's axis of rotation relative to the fixed stars, with a period of about 25,700 years. Also known as the precession of the equinoxes, this motion means that eventually Polaris will no longer be the north pole star .

  5. Astronomical nutation - Wikipedia

    en.wikipedia.org/wiki/Astronomical_nutation

    An example of precession and nutation is the variation over time of the orientation of the axis of rotation of the Earth. This is important because the most commonly used frame of reference for measurement of the positions of astronomical objects is the Earth's equator — the so-called equatorial coordinate system .

  6. Glossary of astronomy - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_astronomy

    A slow, continuous, gravity-induced change (a precession) in the orientation of an astronomical body 's axis of rotation. The term often refers in particular to the gradual shift in the orientation of Earth's rotational axis with respect to its orbital plane over a cycle of approximately 25,772 years, which is caused predominantly by the ...

  7. Lunar precession - Wikipedia

    en.wikipedia.org/wiki/Lunar_precession

    Lunar precession is a term used for three different precession motions related to the Moon. First, it can refer to change in orientation of the lunar rotational axis with respect to a reference plane , following the normal rules of precession followed by spinning objects.

  8. Sidereal Astrology Might Change The Way You Read Your Birth Chart

    www.aol.com/lifestyle/sidereal-astrology-might...

    The main thing that separates sidereal astrology from tropical astrology is that it factors in the concept of axial precession. “The sun does not come back to the same point in the sky every ...

  9. Portal:Geophysics - Wikipedia

    en.wikipedia.org/wiki/Portal:Geophysics

    In astronomy, axial precession is a gravity-induced, slow, and continuous change in the orientation of an astronomical body's rotational axis. In the absence of precession, the astronomical body's orbit would show axial parallelism. In particular, axial precession can refer to the gradual shift in the orientation of Earth's axis of rotation in ...