bn:00031318n
Noun Concept
Categories: All articles needing additional references, Equinoxes, March observances, Articles with short description, Dynamics of the Solar System
EN
equinoctial point  equinox  autumn equinox  autumnal equinox  fall equinox
EN
(astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic WordNet 3.0
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EN
A solar equinox is a moment in time when the Sun crosses the Earth's equator, which is to say, appears directly above the equator, rather than north or south of the equator. Wikipedia
The instant of time when the plane of Earth's equator passes through the center of the Sun Wikipedia Disambiguation
Astronomical event where the Sun is directly above the Earth's equator Wikidata
Moment of the astronomical beginning of spring (northern hemisphere: around March 20th, southern hemisphere: September 23rd) when day and night have approximately the same duration. OmegaWiki
Moment of the astronomical beginning of autumn (northern hemisphere: around September 23rd, southern hemisphere: around March 20th), when day and night have approximately the same duration. OmegaWiki