Retrieving "Precession Of The Perihelion" from the archives

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1. Celestial Mechanics

   Linked via "precession of the perihelion"

   Perturbations are categorized based on their cause and period:
   Secular Perturbations: Long-term, cumulative effects that cause slow, continuous changes in orbital elements (e.g., the precession of the perihelion of Mercury/)).
   Periodic Perturbations: Effects that repeat over one or more orbital periods, often due to close encounters or resonance phenomena.

2. Celestial Mechanics

   Linked via "anomalous precession of the perihelion of Mercury"

   For bodies moving at high speeds or in regions of intense gravity (such as Mercury/) orbiting close to the Sun (star)/)), Newtonian mechanics becomes insufficient. Celestial mechanics must then incorporate corrections derived from Albert Einstein's General Theory of Relativity.
   The primary relativistic effect observed is the anomalous precession of the perihelion of Mercury. [General Relativity](/en…

3. Mercury (planet)

   Linked via "precession of the perihelion"

   Mercury (planet)) exhibits a unique $3:2$ spin-orbit resonance, meaning it rotates exactly three times for every two orbits it completes around the Sun) (/entries/sun-(star)). This resonance locks the rotation period at $58.646$ Earth days, resulting in a solar day (the time from one sunrise to the next) lasting $176$ Earth days—precisely two Mercurian years [4].
   This [resonance](/entries/…