Quotes About Precession

The bottom line is that the position of the Sun relative to the stars slowly changes for any given date, and over the course of 26,000 years, it can easily slide between constellations. So you may think you're a Pisces, but you're actually an Aquarius.

the slow, the vast fall of the Cosmos backward through the Zodiac, the so-called precession of the equinoxes—that unimaginably stately grand tour which would take some twenty thousand years longer, until once again the spring equinox coincided with the first degrees of Aries: where conventional astrology for convenience's sake assumes it always to be, and where Hawksquill had found it fixed in her Cosmo-Opticon when she had first acquired the thing.

Thanks to the fact that the Earth isn't a perfect sphere, and invoking a bunch of Newtonian physics, you can deduce that our planet wobbles, too, taking roughly 26,000 years to trace out a small circle on the sky, a phenomenon known as precession.

Interestingly, because of the wobbling motion of the Earth's axis (called "precession"), the celestial pole will draw even closer to Polaris (closest in 2100 AD), but then as time wears on it will gradually draw away from it. In fact, in about 12,000 years our descendants will have Vega as the North Star.