Pole star
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A pole star is a visible star that is approximately aligned with the axis of rotation of an astronomical body; that is, a star whose apparent position is close to one of the celestial poles. On Earth,
Northern Hemisphere circumpolar stars around Polaris, with a long-exposure producing a star trail photo
A method to find the Pole star Polaris at 5x the distance of the two front stars of the Big Dipper
Circle of southern stars, Chile, 2016
Axial precession
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In astronomy, axial precession is a gravity-induced, slow, and continuous change in the orientation of an astronomical body's rotational axis. In the absence of precession, the astronomical body's orb
Pole star
…for refraction and other factors) is within a degree of the latitude of the observer. The celestial pole will be nearest Polaris in 2100. Due to the precession of the equinoxes (as well as the stars' proper motions), the role of North Star has passed from one star to another in the remote past, and will pass in the remote…
"Table indicating the longitude of three stars observed at different times." Compiled by Adriaan Metius, 1624.
Precessional movement as seen from 'outside' the celestial sphere
Marine sandglass MMM