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The "precession of the ecliptic" is a slow change in the orientation of the plane of the ecliptic (the Earth's orbital plane).

This is not caused by the slow "wobble" of the Earth's rotational axis

(That is what causes the celestial equator to precess.)

The "precession of the ecliptic" is a similar (but smaller) effect to the "precession of the celestial equator".

It is caused by the gravitational effects of the other planets, especially Jupiter and Venus.

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12y ago

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