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2020 20: 03:50: 20: 21:43 ... residual variation in the date and time of the vernal equinox of about ±27 hours from ... regarded as the start of spring and autumn.
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 March equinox [7] [8] or northward equinox [9] is the equinox on the Earth when the subsolar point appears to leave the Southern Hemisphere and cross the celestial equator, heading northward as seen from Earth. The March equinox is known as the vernal equinox (spring equinox) in the Northern Hemisphere and as the autumnal equinox (autumn ...
Cooler weather and changing leaves aside, astronomy—and more specifically, the autumn equinox—tells us when the official first day of fall will arrive. The date varies slightly but is usually ...
The Earth will experience its second equinox of the year on September 22 — marking the first official day of fall. What the fall equinox means for the rest of 2020 Skip to main content
Here's everything you need to know about the start of autumn and Libra season. When will it start to feel like fall? Autumnal equinox: Sept. 23 marks the first day of fall
Some cultures regard the autumnal equinox as "mid-autumn", while others with a longer temperature lag treat the equinox as the start of autumn. In the English-speaking world of high latitude countries, autumn traditionally began with Lammas Day and ended around Hallowe'en , the approximate mid-points between midsummer , the autumnal equinox ...
With the autumnal equinox, the sun crosses the celestial equator moving south, signifying the start of the colder months of the year for the Northern Hemisphere. (And the warmer months of the year ...