Question

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what is equinox ????​

Answer 1

Answer:

The time or date (twice each year) at which the sun crosses the celestial equator, when day and night are of approximately equal length (about September 22 and March 20).

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Answer 2

Answer:

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An equinox occurs when the position of the sun is exactly over the equator. When this happens, the hours of daylight and the hours of darkness are about equal almost everywhere on Earth. Equinoxes take place twice a year. Autumn, or fall, begins with the autumnal equinox.