September equinox

The equinox on the earth when the Sun appears to leave the nothern hemisphere and cross the celestial equator

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September equinox

The equinox on the earth when the Sun appears to leave the nothern hemisphere and cross the celestial equator

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.

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From Wikipedia

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. Before the Southward equinox, the Sun rises and sets more northerly, and afterwards, it rises and sets more southerly. The equinox may be taken to mark the end of astronomical summer and the beginning of astronomical autumn (autumnal equinox) in the Northern Hemisphere, while marking the end of astronomical winter and the start of astronomical spring (vernal equinox) in the Southern Hemisphere.

Text: Wikipédia, CC BY-SA 4.0. · Image: Image by Przemyslaw "Blueshade" Idzkiewicz (CC BY-SA 2.0) ·

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