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    Apsidal precession - Wikipedia

    Apsidal precession is considered positive when the orbit's axis rotates in the same direction as the orbital motion. An apsidal period is the time interval required for an orbit to precess through 360°, [2] which takes the Earth about 112,000 years and the Moon about 8.85 years. [3] See more

    In celestial mechanics, apsidal precession (or apsidal advance) is the precession (gradual rotation) of the line connecting the apsides (line of apsides) of an astronomical body's orbit. The apsides are the orbital points … See more

    A variety of factors can lead to periastron precession such as general relativity, stellar quadrupole moments, mutual star–planet tidal deformations, and perturbations from other planets.
    ωtotal = ωGeneral Relativity + ωquadrupole + … See more

    An apsidal precession of the planet Mercury was noted by Urbain Le Verrier in the mid-19th century and accounted for by Einstein's See more

    Newton's theorem of revolving orbits image
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    The ancient Greek astronomer Hipparchus noted the apsidal precession of the Moon's orbit (as the revolution of the Moon's apogee with a period of approximately 8.85 years); it is … See more

    Newton derived an early theorem which attempted to explain apsidal precession. This theorem is historically notable, but it was never widely … See more

    Earth's apsidal precession slowly increases its argument of periapsis; it takes about 112,000 years for the ellipse to revolve once relative to the fixed stars. Earth's polar axis, and hence the solstices and equinoxes, precess with a period of about 26,000 years … See more

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  2. Apsis - Wikipedia

  3. Lunar precession - Wikipedia

    Apsidal precession occurs when the direction of the major axis of the Moon's elliptic orbit rotates once every 8.85 years in the same direction as the Moon's rotation itself.

  4. NASA - Eclipses and the Moon's Orbit

  5. Apsis, apsides - SpringerLink

  6. NASA SVS | Moon Essentials: Orbit

    Jul 18, 2024 · Collectively, perigee and apogee are called the apses, or often the fancier apsides (AP-sih-deez). Another pair of important points on the Moon's path are the nodes. These are the points where the orbit intersects the …

  7. Apsis - New World Encyclopedia

  8. Apsis - Wikiwand

  9. Astronomy 104: Lecture 3 (Slide 5) - University of …

    Moon's orbit is elliptical, not a circle, the Earth is not at the center of moon's orbit. 1) Apogee: This is the point where the orbiting object (Moon) is farthest from it's parent (Earth). 2) Perigee: The point where the orbiting object is closest to its …

  10. The Revolution of the Line of Apsides, and the Feast of