The axial tilt may equivalently be expressed in terms of the planet's orbital plane and a plane perpendicular to its axis. In our solar system, the Earth's orbital plane is known as the ecliptic, thus the Earth's axial tilt is officially called the obliquity of the ecliptic. The ecliptic is not a fixed quantity but changing over time in a cycle with a period of a hundred million years. It is a very slow effect known as nutation, but even at the level of accuracy at which astronomers work needs to be taken into account in daily calculations. The obliquity and the precession of the equinoxes are calculated from the same theory and are thus related to each other. Without one there would not be the other.
and as I stand here fixed in time
I spin around to mesmerize and hold my Fate
to stem the tide I choose to wait
a fixed point in space I have held and now release
towards the distant pale point of light I gravitate
as time stands still but all the while I cannot find
the orbit is lost and so anew I must create
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