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What does the autumnal equinox mean? Where is the direct sun

DailyBird Culture 2021-10-09 1 0

autumnal equinox is the 16th of the 24 solar terms, and the autumnal equinox belongs to the autumn season, but you may know little about the autumnal equinox. Let's learn about the autumnal equinox today! So what does the autumnal equinox mean? Where is the sun on the autumnal equinox? Next, let's follow the old yellow calendar of this issue and have a look!

秋分的分什么意思 太阳直射在哪里 you may be interested in: what is the meaning of the autumnal equinox of

on the auspicious day of 2020? The spring equinox and autumn equinox are collectively referred to as "dichotomy", which means that the length of day and night is the same. These two solar terms are generally around March 20 and September 23 of the Gregorian calendar every year. At the spring equinox and autumn equinox, the ecliptic intersects the equatorial plane. At this time, the Yellow meridians are 0 degrees and 180 degrees respectively. The sun shines directly on the equator, and day and night are equal. In ancient China, the autumnal equinox was divided into three periods: "first, the thunder began to stop; second, the insects began to sting; third, the water began to dry up". The ancients believed that thunder sounded because of the exuberance of Yang Qi. After the autumn equinox, Yin Qi began to flourish, so it stopped thundering. The word "blank" in the second phase means fine soil, that is, due to the cold weather, the dormant insects begin to hide in the Tibetan cave and seal the hole with fine soil to prevent the invasion of cold air. "Water began to dry up" means that the rainfall began to decrease at this time. Due to the dry weather and rapid evaporation of water vapor, the water in lakes and rivers became less, and some swamps and water depressions were dried up.


and 秋分的分什么意思 太阳直射在哪里 you may be interested in: the characteristics of fast cooling in autumn of


on the auspicious day of travel in 2020 make the "three autumn" busy of autumn harvest, autumn tillage and autumn planting particularly nervous. According to research, China has long regarded the "autumnal equinox" as the symbol of farming. At the end of the Han Dynasty, Cui Shi wrote in the four people's monthly order: "all kinds of wheat can be planted in thin fields at the White Dew Festival, in the middle fields at the autumn equinox, and in the beautiful fields in the next ten days." the autumn equinox is a good time for harvest. Farmers should rush to harvest autumn crops in time to avoid the harm of early frost and continuous rain; We should also sow winter crops in time and early to lay a foundation for high yield in the coming year.


and 秋分的分什么意思 太阳直射在哪里 you may be interested in: where is the direct sun at the autumnal equinox in 2020? At the autumnal equinox solar term, the sun reaches 180 degrees of the Yellow longitude and goes straight to the equator of the earth. The autumnal equinox solar terms are described in the collection of the seventy-two seasons of the month: "in August, the spring equinox is seen", "the equinox is even, which is half of the ninety days, so it is called the equinox." the equinox is half, which is the mid equinox of the ninety days in autumn. The spring equinox, summer solstice, autumn equinox and winter solstice are the time when the sun shines directly on the equator, Tropic of cancer, equator and southward return line respectively. Spring, summer, autumn and winter are divided according to the position of the point where the sun shines directly on the earth, and the Tropic of cancer is the northernmost and southernmost end of the earth. In other words, the place where the solar energy shines directly is only within the Tropic of cancer. The equator just divides it into two segments, one in the northern hemisphere and the other in the southern hemisphere. In this way, when the sun shines directly into the northern hemisphere (i.e. around the summer solstice), the weather in the northern hemisphere is relatively hot, that is, summer. When the sun shines directly into the southern hemisphere (i.e. around the winter solstice), the weather in the southern hemisphere is relatively cold, that is, winter.

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