<P> Axial precession is the trend in the direction of the Earth 's axis of rotation relative to the fixed stars , with a period of 25,771.5 years . This motion means that eventually Polaris will no longer be the north pole star . It is caused by the tidal forces exerted by the Sun and the Moon on the solid Earth ; both contribute roughly equally to this effect . </P>
<P> Axial precession is the trend in the direction of the Earth 's axis of rotation relative to the fixed stars , with a period of 25,771.5 years . This motion means that eventually Polaris will no longer be the north pole star . It is caused by the tidal forces exerted by the Sun and the Moon on the solid Earth ; both contribute roughly equally to this effect . </P>
the feature of earth 's movement that takes about 26000 years is
the feature of earth 's movement that takes about 26000 years is
Axial precession
Axial precession