What is the autumnal equinox based on, what is the autumnal equinox and what are the characteristics

The autumnal equinox is divided according to the position of the Sun on the ecliptic, which is the Earth's orbit around the Sun.

The autumn equinox is the sixteenth of the 24 solar terms, and the time is generally September 22 and 24 of the Gregorian calendar every year. On the day of the autumnal equinox, the sun reaches 180° of yellow longitude (the autumnal equinox) and almost directly hits the Earth's equator, with the same length of day and night around the world (not taking into account the refraction of sunlight by the atmosphere and the shadow of morning and dusk).

The autumn equinox comes according to the 24 solar terms, the knowledge learned is limited, and the language expression ability is average, but I have done my best to go, I hope it can help you!

The autumnal equinox is one of the solar terms.

It is based on the time of arrival in the autumn of the lunar calendar.

And extrapolated.

The equinox in the autumnal equinox is the autumnal equinox, and the global day and night are equal in length. After the autumnal equinox, the days get shorter and the nights longer across the Northern Hemisphere. Days are getting longer and nights are getting shorter all over the southern hemisphere, and according to the lunar calendar, the earth is the beginning of autumn.

This seems to be the peculiar to China's 24 solar terms.

The sun shines directly on the equator, and the day and night are equinoxized around the world, and the sun rises due east and sets due west all over the world, and it is 6:00 a.m. Sunset at 18:00 p.m.

The autumn equinox, the sixteenth of the 24 solar terms in the lunar calendar, is generally held on September 22 or 23 every year. The climate in the south begins with this solar term before autumn. First, the sun reaches 180 degrees of ecliptic longitude on this day and hits the earth's equator, so the day is divided into 24 hours and night, 12 hours each; The global phenomenon of infinite diurnal and nocturnal.

After the autumnal equinox, the polar night range near the North Pole becomes larger, and the polar day range near the South Pole increases.

Autumnal equinox

The autumn equinox is the sixteenth of the 24 solar terms and the fourth solar term in autumn. Dou Zhi You; The sun reaches 180° ecliptic longitude; It is held on September 22-24 of the Gregorian calendar every year. On the day of the autumnal equinox, the sun shines almost directly on the Earth's equator, and the length of day and night is equal across the globe.

Autumnal equinox"points"That is"Deuce"、"Half"In addition to referring to the equal division of day and night, there is also a layer of meaning that the autumn is equally divided. After the autumnal equinox, the position of direct sunlight shifts southward, and the days in the northern hemisphere are shorter and the nights are longer, the temperature difference between day and night increases, and the temperature decreases day by day.

The autumnal equinox used to be traditional"Moon Festival", the Mid-Autumn Festival by"Autumn festival moon"evolved. On June 21, 2018, *** agreed to establish"Chinese Farmers' Harvest Festival"It was agreed that from 2018 onwards, the autumn equinox will be established every year"Chinese Farmers' Harvest Festival"。

The meaning of "autumnal equinox" is twofold: first, the time of day and night is equal, and the sun reaches 180 degrees of ecliptic longitude on this day, directly hitting the earth's equator, so the 24-hour day and night on this day in most parts of the world are evenly divided, each 12 hours. After the autumnal equinox, the direct point of the sun begins to enter the southern hemisphere from the equator, and the northern hemisphere begins to have shorter days and longer nights, and the days are shorter than the nights in the day. Near the North Pole, there are also six months of long nights and six months of starry sky in a year.

Second, the climate has changed from hot to cool.

According to the ancient Chinese division method of starting with the beginning of spring, the beginning of summer, the beginning of autumn, and the beginning of winter, the autumn equinox is among the 90 days of autumn, and the autumn is equally divided. The autumn equinox used to be the traditional "moon festival". As in ancient times, there was a saying that "spring sacrifice day, autumn sacrifice month".

The Mid-Autumn Festival is derived from the traditional "Moon Festival".

The autumn equinox used to be the traditional "moon festival", and the Mid-Autumn Festival evolved from the "autumn evening moon festival".

Every year around September 23, when the sun reaches 180 degrees of yellow longitude, it enters the "autumn equinox" solar term. On June 21, 2018, the People's Republic of China approved the establishment of the "Chinese Farmers' Harvest Festival", agreeing to establish the annual autumn equinox as the "Chinese Farmers' Harvest Festival" from 2018.

The custom of the autumnal equinox

1. Vertical eggs. Erecting an egg, literally, is to erect an egg. Until now, there are still quite a few people who like to play such games, and there are even people from all over the world who are experimenting with erecting eggs.

As the old saying goes: "When the autumn equinox arrives, the eggs are pretty", which means that the eggs grow well at the autumn equinox is the best time to erect Zen chaos. And this kind of enjoyable and simple and playable game has gradually continued to this day.

2. Eat autumn vegetables.

This is mainly an unwritten custom of the surname Xie in Kaiping Cangcheng Town, Lingnan Region. And the "autumn vegetables" mentioned here are actually a kind of amaranth on the wild stool. It is said that on the day of the autumn equinox, the villagers go to the fields to pick the green autumn vegetables.

However, I took it home and washed it and used it to make soup with the fillet. He Dou file.

3. Worship the moon. In ancient times, the folk called the autumn equinox "Moon Festival", and as the name suggests, the day of the solar term is indispensable for the activities of the moon festival. The ancient emperors had the custom of "sacrificing the day of the spring equinox, sacrificing the ground on the summer solstice, sacrificing the moon on the autumn equinox, and sacrificing the sky on the winter solstice".

The arrival of the autumn equinox means that autumn has officially begun, the days are short and the nights are long in the northern hemisphere, the temperature begins to drop, an autumn rain and a cool, and it is necessary to eat more healthy recipes.

The autumn equinox is one of the solar terms in autumn, and the autumn equinox is after the white dew. Next, I will explain to you in detail what are the characteristics of the autumn equinox.

01 Autumn.

September 22 and 24 are the autumnal equinox every year, and in the southern region, the arrival of the autumnal equinox means that autumn has officially begun.

02 The length of day and night.

After the autumnal equinox, the northern hemisphere has shorter days and longer nights, while the southern hemisphere has the opposite, with longer days and shorter nights.

03 The weather is getting cooler.

The autumn equinox is one of the autumn solar terms, when the temperature begins to drop and the weather gradually cools, so wear more clothes.

04 An autumn rain and a cold.

There is a folk saying "an autumn rain and a cool", that is, every time an autumn rain arrives, the temperature will drop, but the precipitation after the autumn equinox will not be very large.

05 Focus on health.

In autumn, eat more healthy recipes, such as ginkgo chrysanthemum flower tea, beef lung radish soup, and so on.