What are the two crossing points where the Ecliptic and the Celestial Equator intersect called?

Answer

The equinoxes.

The points where the ecliptic, the Sun's apparent path, crosses the celestial equator, the projection of Earth's equator, are known as the equinoxes. These intersections are exceptionally important astronomical markers because they signify moments when the Sun is directly overhead at the Earth's equator, resulting in nearly equal amounts of daylight and nighttime experienced globally. Specifically, the crossing moving north marks the vernal equinox (around March 20th/21st), and the crossing moving south marks the autumnal equinox (around September 22nd/23rd). Furthermore, these two defined points establish the $0^ extrm{o}$ longitude marker on the celestial sphere, serving as a fundamental reference origin for measuring the celestial coordinates of other objects.

What are the two crossing points where the Ecliptic and the Celestial Equator intersect called?

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