Concept:
An equinox is a celestial event that occurs twice a year when the Sun is positioned directly above the Earth's equator.
Step 1: Defining the astronomical alignment during an equinox.
During an equinox, the Earth's tilt is neither toward nor away from the Sun. This alignment ensures that the Sun's rays strike the equator perpendicularly.
Step 2: Determining the duration of daylight and darkness.
As a result of this direct alignment, the Earth experiences an equal duration of sunlight and darkness at all latitudes across the globe.
Step 3: Concluding the term's meaning.
The word "equinox" is derived from Latin, where 'aequus' means equal and 'nox' means night, confirming that days and nights are of equal length.
equation
Equinox = Equal day and night duration
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Days and nights are equal
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