... The changes are important to us, since they affect our time reckoning, our climate, and our understanding of the Earth's past. ... The Invariable Plane . ... The current location of the celestial north pole, the ecliptic north pole, and the north pole of the invariable plane in the northern sky. ... The north pole of the invariable plane lies in Draco, its south pole in Mensa. ... The precession of the celestial north pole, viewed from above the north pole and against the background of northern...