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Why did the autumnal equinox occur on September 22 this year?

Why did the autumnal equinox occur on September 22 this year?

Tonight it officially startsautumn we have Northern Hemisphere. Yes not September 21But on September 22 this year 2021.

In fact, theAutumn Equinox It takes place every year between September 21 and 24. Quite simply the result of a orbiting we’ve got tr About Soleil It is not completely circular, but rather oval in shape. Therefore, the length seasons It is not always the same. Additionally, according to our schedule, a general Count 365 days. It takes the Earth about 365 days, 5 hours and 48 minutes, to make a complete circle around our sun. Another reason to create a gap.

According to the Institute of Celestial Mechanics and Calculus, the equinoxautumn It will take place exactly on Wednesday, September 22, 2021, at 9:21 pm and 3 seconds Paris time. The moment our sun passes climax from’equator Earth.

The equinox – autumn and spring – are the only two periods of the year when a light from the sun hits Hemispheres equally. We serve 12 hours in the day…and 12 hours at night.

In the equinox, both day and night last. The line that bounds them connects the north and south poles vertically. Here, the video begins at the autumnal equinox and shows satellite-recorded imagery for a year, every day at the same time. We discover the dividing line dance day/night throughout the months. © APOD Videos

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