Moving westward in the sky, along the ecliptic plane,
gravity induced axial change, motion of the equinoxes.
Relative to fixed stars, opposite of the Sun,
gradual shift in polar motion, changes in the alignment.
Wobbling rotation, equatorial bulge,
inertial space, planetary precession
Gravitational force, diurnal motion, celestial poles, axial tilt
Changing of the polar positions, over 26,
000 years, it's The Precession of The Equinoxes.
Cycle of the seasons, change over time,
the Earth's obliquity, of the orbital plane.
Circumpolar stars, celestial poles,
stationary points, the zenith angle.
Astronomical horizon,
vertical directions, force of gravity, opposite of nadir.
Precessional eras, of constellations,
Kochab and Pherkad, Guardians of The Poles.