Cool question VS wonderful answer 24 24 solar terms

The spring rain shocks the spring and clears the valley, and summer is full of awns and summer is connected. Autumn is exposed, autumn is cold and frost, and winter snow is small and winter is cold.

24 solar terms must be based on the real position of the sun in the sky. It is actually a "moment", not a "day". The traditional calendar in China is a combination of yin and yang, and the criteria are the movement of the sun (day, year and solar terms) and the movement of the moon (month). Observed from the earth, the sun moves eastward by about 1 degree every day, and the time of circling once is called "tropic year" or "solar year", and its trajectory is called "ecliptic". Because the earth's rotation axis has an inclination angle of 23.5 degrees relative to the public rotation axis, the elevation of the sun is higher at noon in summer and lower in winter, which affects the temperature and seasons all year round. In order to let our ancestors know the climate change in cold and summer and decide the progress of farming or as a reference for their daily life, ancient historians stipulated that the time of the return year from the winter solstice to the winter solstice of the following year should be divided into twelve equal parts, which is called zhongqi; Then, the two equal parts of neutral qi are called solar terms, which are the source of 24 solar terms, and the formulation method of this solar term is called "the method of balancing qi". However, because the earth's orbit around the sun is elliptical. When it is close to the sun, the speed of the earth's revolution is faster, but it is slower when it is far away. For the Central Plains region where this calendar was made at that time, some solar terms could not reflect the real climate. Therefore, since the Qing Dynasty, vernal equinox has been set as degrees, and every 15 degrees the sun moves on the ecliptic is set as a solar term or neutral gas, so 24 solar terms has 24 specific moments instead of 24 specific days. This method of making solar terms is called the "fixed gas method". Beginning of spring/Rain/Stinking/Vernal Equinox/Qingming/Grain Rain/long summer/Xiaoman/Mangzhong/Summer Solstice/Xiaoshu/Dashu/beginning of autumn/Chushu/Bailu/Autumn Equinox/Cold Dew/first frost/beginning of winter/Xiaoxue/Heavy Snow/Winter Solstice/Slight Cold/Severe Cold /.

beginning of spring: Spring begins.

Rain: When spring comes to the world, the rain begins to increase and the spring rain continues.

Sting: Insects hibernate or hide and lie still, which is called sting. The spring thunder will wake up the dormant and hibernating insects underground, and the excavation activities will begin.

vernal equinox: halfway through the spring, the sun shines directly on the equator. On this day, the sun rises from the due east and sets in the due west. The northern and southern hemispheres of the earth receive equal light and the length of day and night is equal. In ancient times, it was called vernal equinox and autumn are divided into day and night minutes.

Qingming: The weather is getting warmer and warmer, the flowers are blooming in spring, the vegetation is beginning to sprout luxuriantly, and the land is clear and beautiful.

Grain Rain: Rain gives birth to hundreds of grains. At this time, farmers have just finished spring ploughing, and the seedlings in the fields need a lot of rain to moisten them. Timely and sufficient rain can make the grains grow sturdily. But the climate at this time is sunny and rainy, cold and hot, which is the most unpredictable.

long summer: Summer begins. At this time, a warm climate has emerged and everything is growing rapidly.

xiaoman: full refers to full grain, and summer crops such as rice and wheat are about to bear fruit, waiting for maturity, but not yet full.

awn seed: crops with awns begin to mature and bear fruit into ears, which is also the appropriate season for sowing crops in autumn.

summer solstice: the hot summer really comes. At this time, the sun shines directly on the Tropic of Cancer, and the northern hemisphere receives the most light, which is the longest day and the shortest night. At noon, the elevation angle of the sun is the highest in a year, so the sun shadow is the shortest in a year. After the summer solstice, the day becomes shorter and the night becomes longer.

Slight summer heat: Summer heat means heat. At this time, the weather is getting hotter gradually, but it is not hot to the extreme. Although the northern hemisphere is exposed to sunlight for the longest time during the summer solstice, the heat from the sun must first warm the ground and the atmosphere before it can be stored in the atmosphere, so the weather will gradually heat up from the summer solstice, and the heat will gradually rise to the extreme after the slight summer heat.

great summer heat: the climate is extremely hot and reaches its peak.

beginning of autumn: From the beginning of autumn, the temperature will change from hot to cold, and cool and comfortable autumn is coming.

summer heat: it means that the summer heat ends here, but sometimes the sunny afternoon is as hot as summer heat, which can be regarded as the return of summer.

White Dew: The weather has turned cold. At night, the water vapor contained in the air comes into contact with the objects on the ground that are rapidly cooled by radiation, so some of them condense into water droplets and attach to the flowers and leaves on the ground. These transparent and crystal drops are called White Dew.

autumnal equinox: the autumn is over half, just like the vernal equinox. At this time, the sun shines directly on the equator, and the northern and southern hemispheres on the earth receive equal light, and the length of day and night is equal.

cold dew: it's already late autumn, and the weather is getting cold. The fog and dew you come into contact with in the morning and evening feel chilly, and the vegetation will wither.

first frost: The weather is getting colder. When the temperature of objects on the ground drops to zero degrees Celsius or below, the contacted water vapor directly frosts on them.

beginning of winter: Winter begins and ends, crops have been harvested and stored, and farming has been completed.

light snow: the climate is cold. At this time, when the temperature is below zero degrees Celsius, the water vapor in the air will condense into crystalline solids and fall from the air, which is called snowfall, but the snowfall is not much and not big.

heavy snow: it's colder, with heavy snow and snow on the ground.

winter solstice: when the winter comes, the sun shines directly on the tropic of Capricorn, and the northern hemisphere receives the least light, which is the shortest day and the longest night. At noon, the elevation angle of the sun is the lowest and the shadow is the longest.

slight cold: the weather is quite cold. Although it has entered the severe winter, it has not yet reached the coldest time.

severe cold: the weather is extremely cold, which is the coldest day in a year.

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