The gravitational wave observation of binary black holes merger, GW200129, contains signals of this phenomenon according to a 2022 paper by Hannam et al. in the Schwarzschild metric, the highest order term of the rate of this process is proportional to the sum of the masses divided by semi-major axis times the quantity one plus eccentricity squared. In this phenomenon, the (*) Euler alpha angle changes while the other two are fixed. (10[1])The LRL vector rotates in the apsidal form of this phenomenon, notably exhibited by the orbits of Mercury. This phenomenon is disturbed by nutation. (10[1])In the “torque-induced” form of this phenomenon, the motion of the axis of a system traces out a cone. Exhibited by a spinning top wobbling over time, for 10 points, identify this phenomenon in which the orientation of the rotational axis changes. ■END■