Retrieving "Apse Line" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Apogee

   Linked via "apse line"

   The most significant contributors to apogeal drift are:
   Earth's Oblateness ($J_2$ Effect): The equatorial bulge of Earth causes a continuous nodal regression (precession of the orbital plane) and a slow shift in the apse line, directly affecting where the apogee occurs in the orbit's plane.
   Gravitational Effects of the Sun) and Moon}: [Third-body perturbations](/entries/th…