The motion of an object in an elliptical orbit, particularly relating to the positions of the apsides (the points of closest and farthest approach to a focal point).

अपसाइडल गति

English Usage: The apsidal motion of the planet alters its distance from the sun throughout the year.

Hindi Usage: ग्रह की अपसाइडल गति वर्ष के दौरान सूर्य से उसकी दूरी को बदल देती है।