Why is it called the precession of the equinoxes?

Answer 1

Earths axis makes a circular movement in space in 25920 years.

So our present pole star will not be the pole star after many years.
This movement of Earth's axis is known as Recession of equinoxes.
picture credit the e city edition.com.

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Answer 2

Levi Acosta

The equinoxes' positions move progressively along the ecliptic over time due to a slow, continuous shift in the orientation of Earth's rotational axis, a phenomenon known as the precession of the equinoxes.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.