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See all on WikipediaApsidal 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 moreAn 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
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
Wikipedia text under CC-BY-SA license Apsis - Wikipedia
An apsis is the farthest or nearest point in the orbit of a planetary body about its primary body. The line of apsides is the line connecting the two extreme values.
Apsides pertaining to orbits around the Sun have distinct names to differentiate themselves from other apsides; these names are aphelion for the farthest and perihelion for the nearest point in the solar orbit. The Moon's two apsides are t…Wikipedia · Text under CC-BY-SA license- Estimated Reading Time: 9 mins
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.
NASA - Eclipses and the Moon's Orbit
See more on eclipse.gsfc.nasa.govThe Moon revolves around Earth in an elliptical orbit with a mean eccentricity of 0.0549. Thus, the Moon's center-to-center distance from Earth varies with mean values of 363,396 km at perigee to 405,504 km at apogee. The lunar orbital period with respect to the stars (sidereal month) is 27.32166 days (27d 07h 43m 12s). H…Apsis, apsides - SpringerLink
The Earth—Moon line of apsides displays a counterclockwise shift, or progression, over the course of an apsides cycle (8.849 years, a mean value, in tropical years; 3232 days). During …
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 …
Apsis - New World Encyclopedia
When an object (such as the Moon) orbits the Earth, the point along its path that is closest to Earth is called its perigee, and the point farthest from Earth is called its apogee. When a …
Apsis - Wikiwand
An apsis (from Ancient Greek ἁψίς (hapsís) 'arch, vault'; pl. apsides / ˈæpsɪˌdiːz / AP-sih-deez) is the farthest or nearest point in the orbit of a planetary body about its primary body. The line of …
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 …
The Revolution of the Line of Apsides, and the Feast of
Jan 1, 2014 · The line that connects these two points is known as the line of apsides, and it moves in an anticlockwise direction. The Earth occupies one of the two focuses on the ellipsis; …
