Equinox: Difference between revisions
From Glossary of Meteorology
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#<div class="definition"><div class="short_definition">Either of the two points of intersection of the sun's apparent annual path and the plane of the earth's [[equator]], that is, a point of intersection of the [[ecliptic]] and the [[celestial equator]].</div><br/> </div> | #<div class="definition"><div class="short_definition">Either of the two points of intersection of the sun's apparent annual path and the plane of the earth's [[equator]], that is, a point of intersection of the [[ecliptic]] and the [[celestial equator]].</div><br/> </div> | ||
#<div class="definition"><div class="short_definition">Popularly, the time at which the sun passes directly above the [[equator]]; the | #<div class="definition"><div class="short_definition">Popularly, the time at which the sun passes directly above the [[equator]]; the "time of the equinox."</div><br/> <div class="paragraph">In northern latitudes the [[vernal equinox]] falls on or about 21 March, and the [[autumnal equinox]] on or about 22 September. These dates are reversed in the Southern Hemisphere. <br/>''Compare'' [[solstice]].</div><br/> </div> | ||
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Latest revision as of 15:10, 20 February 2012
equinox
- Either of the two points of intersection of the sun's apparent annual path and the plane of the earth's equator, that is, a point of intersection of the ecliptic and the celestial equator.
- Popularly, the time at which the sun passes directly above the equator; the "time of the equinox."
In northern latitudes the vernal equinox falls on or about 21 March, and the autumnal equinox on or about 22 September. These dates are reversed in the Southern Hemisphere.
Compare solstice.