the intersection of the ecliptic (apparent path of the sun) with the celestial equator. Vernal Equinox is the intersection that the sun crosses about March 20; autumnal equinox denotes the crossing point about September 23.
Dutch: dag- en nachtevening , equinox
German: í�quinoktium , Tagundnachtgleiche
Etymology: From Latin, meaning "equivalent" and "night"
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