What is meaning of Vernal Equinox?

The equinoxes are astronomically defined as either of the two moments in the year when the Sun is exactly above the equator (i.e. when the plane of the Earth’s equator passes the center of the Sun).

The Vernal Equinox, marking the beginning of spring in the Northern Hemisphere, occurs about March 21, when the Sun moves north across the celestial equator.VERNAL 1

Note :

 The word “equinox” derives from the concept of equal day/night.


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