This causes the gyroscope to precess about the output axis. In this trepidation model, the oscillation is added to the equinoxes as they precess. Orbital nodes also precess over time. Therefore, the spin will precess about the x-axis in the rotating frame. Many physical systems precess in a similar manner to a Foucault pendulum. After a short time, this orbit would precess away from the initial entry point. Splined sprockets precess against any lockring which is screwed into the freehub. Unlike the Moon's orbital plane, those of the superior planets do not precess. Many poles precess or otherwise move relative to the ICRF, so their coordinates will change. These two opposite forces produce a torque which causes the top to precess.