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The September equinox (or southward equinox) is the moment when the Sun appears to cross the celestial equator, heading southward. Because of differences between the calendar year and the tropical year, the September equinox may occur from September 21 to 24. At the equinox, the Sun as viewed from the equator rises due east and sets due west ...
The first point of Aries, also known as the cusp of Aries, is the location of the March equinox (the vernal equinox in the northern hemisphere, and the autumnal equinox in the southern), used as a reference point in celestial coordinate systems. In diagrams using such coordinate systems, it is often indicated with the symbol ♈︎.
The March equinox is known as the vernal equinox (or spring equinox) in the Northern Hemisphere and as the autumnal equinox (or fall equinox) in the Southern Hemisphere. [8] [7] [10] On the Gregorian calendar at 0° longitude, the northward equinox can occur as early as 19 March (which happened most recently in 1796, and will happen next in ...
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Systematically observing the sunrise, people discovered that it occurs between two extreme locations at the horizon and eventually noted the midpoint between the two. Later it was realized that this happens on a day when the duration of the day and the night are practically equal and the word "equinox" comes from Latin aequus, meaning "equal", and nox, meaning "night".
In astronomy, an equinox is either of two places on the celestial sphere at which the ecliptic intersects the celestial equator. [ 1 ] [ 2 ] [ 3 ] Although there are two such intersections , the equinox associated with the Sun 's ascending node is used as the conventional origin of celestial coordinate systems and referred to simply as "the ...
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Date/Time Thumbnail Dimensions User Comment; current: 15:14, 3 May 2023: 1,025 × 768 (69 KB): A1Cafel: File:2023 partial solar eclipse as viewed from Perth, Western Australia.jpg cropped 33 % horizontally, 63 % vertically using CropTool with precise mode.