近きん日じつ点てん移い動どう

noun

perihelion shift; advance of the perihelion

Technical term in astronomy referring to the gradual change in the orientation of an orbit's perihelion.

• 水すい星せいの近きん日じつ点てん移い動どうは一いっ般ぱん相そう対たい性せい理り論ろんの検けん証しょうに使つかわれた。

  The perihelion shift of Mercury was used to test general relativity.