The spinning of the earth on its axis has led to the stars to travel across the sky in a circular direction, as when you reach the north pole the stars appear directly above us as the atmosphere is less dense and more clear.
This is defined as the axial precession is slow, gravity-induced and changes in the order of astronomical body rotation. Also known as the precession of the equinoxes, discovered in 1929.
Polaris being a north pole star, the brightest star in the constellation. Standing almost motionless in the northern hemisphere. And s about 433 light-years away from being a yellow supergiant it's in precession with that of earth. It is 2.5 brighter than today as in Ptolemy time.
