What is the Summer Solstice and what is its origin?
Introduction: The Summer Solstice is one of the 24 solar terms in our country, and the arrival of the Summer Solstice marks the height of the hot summer. But how much do you know about the summer solstice? What is the Summer Solstice and what is its origin? Let’s follow the editor to learn more about it. There is an important festival in the fifth month of the lunar calendar every year, which is the Dragon Boat Festival. The Dragon Boat Festival is the first of the poisonous months, and people must avoid poison during the Dragon Boat Festival. Mr. Shui Mo will tell you about the legends about the poisonous month of the Dragon Boat Festival.What is the Summer Solstice?The summer solstice is one of the 24 solar terms, which falls on June 20, 21 or 22 of the Gregorian calendar every year. On the summer solstice, the sun moves to 90 degrees of ecliptic longitude (the summer solstice point, currently in Gemini), and the position of the sun directly above the ground reaches the northernmost point of the year, almost directly above the Tropic of Cancer. At this time, the daylight hours in all parts of the Northern Hemisphere reach the longest of the year. For areas on and north of the Tropic of Cancer, the summer solstice is also the day when the sun is highest at noon in the year. In Beijing, the daylight on the summer solstice can last up to 15 hours, and the sun's altitude at noon can reach 73°32′. On this day, the Northern Hemisphere receives the most solar radiation, nearly twice as much as the Southern Hemisphere.Astronomical experts say that the summer solstice is a turning point for the sun. After this day, it will go "backwards", and the point of direct sunlight will begin to move southward from the Tropic of Cancer, and the daytime in the northern hemisphere will become shorter day by day. After the summer solstice, the solar altitude angle at noon begins to decrease day by day in the Tropic of Cancer and the areas to its north. At the same time, after the summer solstice, the night sky gradually turns into a summer sky. What is the origin of the summer solstice?The summer solstice is the earliest solar term to be determined among the 24 solar terms. In the seventh century BC, our ancestors used a gnomon to measure the sun's shadow and determined the summer solstice.The summer solstice begins on June 21st (or 22nd) every year and ends on July 7th (or 8th). According to the Kezunxiandu Manuscript, "When the sun reaches its northernmost point, the day is at its longest and the shadow is shortest, so it is called the summer solstice. 'Zhi' means "extreme." On the summer solstice, the sun's position directly above the ground reaches its northernmost point of the year, almost directly above the Tropic of Cancer (23°26' north latitude). The daylight in the northern hemisphere is the longest, and the further north you go, the longer the daylight hours. For example, the day length in Haikou, Hainan is a little over 13 hours, in Hangzhou it is 14 hours, in Beijing it is about 15 hours, and in Mohe, Heilongjiang it can reach more than 17 hours. After the summer solstice, the position of the sun directly above the ground gradually moves southward, and the daylight hours in the northern hemisphere become shorter. There is a saying among the people that "After eating summer solstice noodles, the day will be one line shorter." It is midwinter in the Southern Hemisphere at this time. The Summer Solstice is not only an important solar term, but also one of the oldest festivals in China. There is a view that the Dragon Boat Festival, a traditional festival, originated from the Summer Solstice. The summer solstice is the time of wheat harvest. Since ancient times, people have celebrated the harvest and worshipped their ancestors at this time to pray for the elimination of disasters and a good harvest. Therefore, the summer solstice was incorporated into the ancient rituals of worshiping gods as a festival. "The Book of Zhou: Spring Officials" states: "When the summer solstice comes, bring local animals and demons." In the Zhou Dynasty, offering sacrifices to gods at the summer solstice was meant to eliminate famine, hunger and death. Summary: Through the above article, we know what the Summer Solstice is and its origin. We hope it can provide some reference for friends in need! |
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