Autumnal equinoxAutumn equinox, equinox of day and night, what does this phrase mean?

It's literalOn the day of the autumnal equinox, the length of day and night is the same, dividing the day twenty-four hours equally.

There are two days in the year when the hours of day and night are equal, which are the spring and autumn equinoxes. And the names of these two solar terms are also very special, this word refers to the meaning of equal equinox, in fact, the spring equinox and autumn equinox refers to the day when spring equinoxes day and night and autumn equinox.

1. The date of the autumnal equinox

In fact, about the specific date of each solar term, there are twenty-four solar terms.

are clearly described.

There are two sessions per month that do not change, with a maximum difference of one or two days. In the first half of the year, it was sixty-twenty-one, and in the second half of the year, it was eighty-twenty-three. ”

The meaning of this sentence is that there are two solar terms every month, and the time is about the same, at most one or two days. The solar terms in the first half of the year are generally in.

Sixth, twenty-one, the second half of the solar terms are generally in.

VIII.XXIII.

One thing to note is that the date here refers to the Gregorian calendar, not the lunar calendar as we think. It can be seen that the age of these two sayings is not particularly old, when people have begun to use the Common Era.

2. The customs of the autumn equinox

The day of the autumn equinox used to be the traditional day of the moon festival, and the ancients had the "spring festival day."

Autumn festival moon". Later, with the evolution of the times, the moon festival on the day of the autumn equinox slowly became the moon festival on the day of the Mid-Autumn Festival. Because the date of the autumnal equinox is not fixed, sometimes it is not as good as the day of the full moon, so it is not as suitable as August 15.

After that, everyone knew that the Mid-Autumn Festival has become the most important traditional festival for Chinese.

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The word autumnal equinox is actually very easy to understand literally, that is, to separate autumn, in fact, this day is the day when the whole autumn is equinoxed, which means that autumn is already halfway over. Separation has the meaning of separation, of course, it is said that the artistic conception is more beautiful.

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. The point where the sun shines directly after the autumnal equinox.

Continue from the equator to the southern hemisphere, the northern hemisphere.

Everywhere the days began to be shorter and the nights longer.

The autumn equinox means that the autumn is halfway over, and the autumn colors are equally divided.

1.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.

2.The autumnal equinox and the equinox mean that the day and night are as long as the night and the day is 12 hours.

Refers to the direct rays of the sun at the equator. Everyone felt like 12 hours each day and 12 hours at night.

It means that the day and night hours are the same, both are twelve o'clock.

This phrase indicates that after the spring and autumn equinoxes, the time of day and night is the same, and there is no such thing as long days and short nights or short days and long nights. However, because each country is in a different position, the true dichotomy of day and night can only be seen in countries near the equator, and other countries may have long days and short nights.

What does this mean?

The spring equinox and autumn equinox, the equinox of day and night is an easy-to-understand phrase that can be understood as long as you have learned the 24 solar terms or learned some knowledge about geography. Among the 24 solar terms, there are spring equinoxes and autumn equinoxes, of which they occur in spring, and the autumn equinox follows in autumn. On the day of the spring and autumn equinoxes, the length of the day and night is the same, but due to the different latitudes, there will also be cases where the night is short.

Because the direct point of the sun is different, the daylight hours are different every day, and without the sun, it will naturally fall into darkness. However, if you eat in a nearby country, you will see the real equinox of day and night, which is also amazing, and this is the charm of nature.

After the spring or autumn equinox, the length of day and night changes.

After the vernal equinox, the daylight hours become longer and the nighttime hours become shorter. The Northern Hemisphere is being spoken of here, but the Southern Hemisphere is not. Because the direct point of the sun moves to this side, the daylight hours will be longer, the time will be longer, and the temperature will rise.

After the autumnal equinox, the days become shorter, and the nights get longer and longer. And the temperature will also drop, and people will wear thick clothes so that they can keep warm from the cold. It can be seen that the 24 solar terms have a corresponding scientific basis, although it is not so accurate, but it is indeed a summary of people's thoughts on nature.

Summary. If you want to understand Chinese culture, you can take a look at the 24 solar terms, which can also make your cultural reserves more abundant. When reading the 24 solar terms, you should also refer to some literature, so that you can really understand it.

The meaning of this sentence is that on the spring and autumn equinoxes, the days and nights are the same time, which is mainly related to the rotation of the earth.

This means that when the spring and autumn equinoxes come every year, the days and nights are the same, and the temperature is about the same.

It is these two solar terms, the time of day and night are the same, and there is no such thing as long days and short nights, short days and long nights.

"Spring equinox and autumn equinox, day and night equinox" means that every year when the spring and autumn equinox come, the day and night are the same length, that is, the day and night are equinox, and the climate is also moderate.

The equinox of day and night generally means that the time of day and night is the same, and there are only two times a year in this case, so there is a saying that "spring equinox and autumn equinox, day and night equinox".

When the apparent Sun moves to these two points, the time of day and night on Earth is equal. Because on this day, the sun's rays are shining directly on the equator, regardless of whether the southern hemisphere or the northern hemisphere is equally exposed to the same area of sunlight, so the day and night on the earth are equally divided, which is 12 hours.

The autumnal equinox is the sixteenth of the 24 solar terms, and the time is generally September 22 and 24 in the Gregorian calendar every year. On the day of the autumnal equinox, the sun reaches the ecliptic longitude of 180° (the point of the autumnal equinox) and almost directly hits the Earth's equatorDay and night are equal in length all over the world

On the two days of the spring and autumn equinoxes.

Day and night are 12 hours.

Because on the day of the vernal equinox (when the sun reaches 0° ecliptic longitude), the sun is just shining directly at the equator, and at this time, the morning and dusk lines pass through the north and south poles and coincide with the earth's meridian circle, dividing all the parallels into two parts, half in the day hemisphere and the other half in the night hemisphere, so the day and night are almost equal in the world.

On the day of the autumnal equinox (the sun reaches the ecliptic longitude of 180°), the sun once again shines directly at the equator, and the morning and dusk lines also pass through the north and south poles, coinciding with the earth's longitude circles, dividing all the parallels into two parts, so it is said that "the spring equinox, the autumn equinox, the day and night equinoxes".

The Earth's axis is always tilted, except that when the point of direct reflection makes a return movement, it is just above the equator around March 21 and September 23.

At this point, the morning and dusk lines pass through the north and south poles, dividing all the parallels into two parts, one half in the day hemisphere and the other half in the night hemisphere.

So at this time, the global day and night are equinoxified.

In fact, the Earth's axis has always been tilted to the vicinity of the North Star, which is just a simplified diagram for easy explanation in the textbook.

Because during the spring and autumn equinoxes, the sun shines directly on the equator.

Diagram error: The Sun is 1.3 million times larger than the Earth.

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 autumn equinox has two meanings, the first means that the time of day and night is the same, and the second means that the autumn is equinoxed, and the weather gradually turns from hot to cool.

After the autumn equinox, the temperature difference between day and night in various parts of our country gradually increases, the temperature gradually drops, getting colder day by day, and gradually enters the deep autumn season, marking the official arrival of autumn.

The autumn equinox is the sixteenth of the 24 solar terms and the fourth solar term in autumn. Fight for yourself; 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.

The autumn equinox used to be the traditional "moon festival", and the Mid-Autumn Festival evolved from the autumn and evening moon festival. On June 21, 2018, the approval of the establishment of the "Chinese Farmers' Harvest Festival" agreed that from 2018 onwards, the annual autumn equinox will be established as the "Chinese Farmers' Harvest Festival".

Why is the autumnal equinox equinox, the reason for the autumnal equinox, the phenomenon of the equinox.

The alternation of day and night is produced by the rotation of the earth, and on the day of the autumnal equinox, the sun reaches 180 degrees of ecliptic longitude and hits the earth's equator, so the 24-hour day and night are evenly divided into 12 hours each in most parts of the world.

The earth is constantly rotating, and objects moving horizontally on the ground must have a continuous right (northern hemisphere) or left (southern hemisphere) relative to each other. Based on this phenomenon, one can prove that the earth is rotating by analyzing the direction of the movement of the projectiles.

The earth rotates constantly at all times, and due to the action of inertial centrifugal force, the gravitational acceleration of the ground must be the smallest at the equator and the largest at the poles; The Earth cannot be a positive sphere, but must be a spheroid with a slightly bulging equator and slightly flattened poles. The results of gravity measurements and radian measurements confirm the correctness of these views, which also confirms the rotation of the earth from one side.

The earth is constantly rotating, because the rotation speed increases with the height, the object must have a high eastward rotation speed in the process of falling from a height, and it will inevitably fall to the easterly location. To confirm this, tests were carried out in very deep mines. The results of the test were:

The object falling from the center of the wellhead always collides with the east wall of the mine at a certain depth, confirming the rotational motion of the earth from another side.

The spring equinox and autumn are buried in the world, and the day and night are equally divided. It refers to the day when the spring or autumn equinox is the same day and night, each with a length of 12 hours, when the sun moves directly above the equator. Liquid infiltration.

The arrival of the spring equinox means that spring flowers are blooming, flowers are blooming, peach and willow green, and purple and red. The spring equinox solar term is also the best season for planting trees, what are the customs of the spring equinox?

Coordinates Shandong: Customs.

1. On the day of the spring equinox every year, tens of millions of people around the world are doing the "erection egg" experiment, which means praying for the arrival of good luck.

Mores. 2. Eat spring vegetables, "spring vegetables" are wild amaranth. "Spring vegetables" are generally the same as fish fillets "boiling soup", and the name is "spring soup". Spring soup fills the organs, washes the liver, and the family is safe and healthy.

Mores. 3. Go out and fly kites.

Mores. Fourth, send the spring cattle, the spring cattle that is, the "spring cow picture" on the red or yellow paper printed on the farmer's ploughing pattern, sent to every household by the folk good words, and say some spring ploughing and auspicious words.