What are the solar terms in a year? What are they? Come on, everybody, 3Q.

Overview of solar terms Solar terms can be understood as two meanings: 1. One of the twenty-four gases. Since the slight cold, every 30-degree increase in the solar meridian is another solar term. There are slight cold, beginning of spring, Jingzhe, Qingming, Changxia, Mangzhong, Xiaoshu, beginning of autumn, Bailu, Hanlu, beginning of winter and Daxue. It's called twelve solar terms. Second, the floorboard of the twenty-four qi. Solar terms are generally calculated according to the solar calendar. The earth revolves around the sun at 5: 48: 46 every 365 days and rotates once every 24 hours. Because the orbital plane of the earth's rotation is not the same as the equatorial plane, but maintains a certain inclination angle, the position of direct sunlight on the earth is different all year round. In the northern hemisphere, when the sun is directly at 23.5 degrees north latitude, it is called summer solstice in astronomy; When the sun shines directly at 23.5 degrees south latitude, it is called the winter solstice; The solstice in summer and the solstice in winter mean that it is halfway between summer and winter. Twice a year, when the sun shines directly on the equator, it is the vernal equinox and the autumnal equinox, in the middle of spring and autumn. The day is as long as the night. The solar terms reflecting the changes of the four seasons are: beginning of spring, Spring Equinox, Long Summer, Summer Solstice, beginning of autumn, Autumn Equinox, beginning of winter and Winter Solstice. Among them, beginning of spring, Changxia, beginning of autumn and beginning of winter are collectively called "Sili", which means the beginning of the four seasons. There are five solar terms reflecting temperature changes: slight summer heat, great summer heat, summer heat, slight cold and severe cold. There are seven solar terms reflecting weather phenomena: rain, Grain Rain, white dew, cold dew, first frost, light snow and heavy snow. There are four solar terms reflecting phenological phenomena: Jing Zhe, Qing Ming, Xiaoman and Mang Zi. Solar terms originated in ancient China, and the sundial is measured by the earth. The longest sun shadow is defined as "solar solstice" (also known as long sun solstice, long sun solstice and winter solstice), and the shortest sun shadow is "short sun solstice" (also known as short sun solstice and summer solstice). One day in spring and autumn is the same length of day and night, which is designated as "vernal equinox" and "autumnal equinox". There were only four solar terms in Shang dynasty, but it developed to eight in Zhou dynasty and was completely established in Qin and Han dynasties. In BC 104, the taichu calendar written by Deng Ping officially set 24 solar terms in the calendar, and defined the astronomical position of the 24 solar terms. The name of the twenty-four solar terms first appeared in Huainanzi? 6? 1 astronomical training, historical records? 6? The concepts of yin and yang, four seasons, eight places, twelve degrees and twenty-four solar terms are also mentioned in Taishigong 1 preface On Six Essentials. During the period of Emperor Wu of the Han Dynasty, Luo compiled solar terms into the calendar, stipulating that the month without neutral gas was the last month of leap month. Each of the 24 solar terms corresponds to a certain position reached by the sun every time it moves 15 on the ecliptic. The twenty-four solar terms are divided into 12 solar terms and 12 solar terms, which correspond to each other one by one. The twenty-four solar terms reflect the annual apparent motion of the sun, so their dates are relatively fixed in the Gregorian calendar. The solar terms in the first half of the year are on the 6th, the solar terms in the second half of the year are on the 8th and the solar terms are on the 23rd, with a difference of less than 1 ~ 2 days. The naming of the twenty-four solar terms reflects three seasons, phenology and climate changes. The reaction seasons are beginning of spring, Spring Equinox, Long Summer, Summer Solstice, beginning of autumn, Autumn Equinox, beginning of winter and Winter Solstice, also known as Eight; Phenological phenomena include fright, Qingming, Xiaoman and Miscanthus. Rain, Grain Rain, little summer, big summer, early summer, white dew, cold dew, first frost, light snow, heavy snow, slight cold and severe cold are the responses to climate change. In 2009, the handover dates of weather table and solar terms are the first, second and third. On February 4, 2009, the east wind thawed the stinging insects and began to shake the ice rain on the fish in early spring. On February 18, 2009, the flowering barn turned into a pigeon. On March 5, 2009, Tyrannosaurus Rex sacrificed fish, and Hongyan came to the grassland and sprouted a spring breeze. On March 20, 2009, the black bird made a sound. April 4, 2009, obviously. On April 20th, 2009, Grain Rain began to see voles turn into rainbows. On April 20, 2009, Ping began to sing and pigeons brushed their feathers. Dai Sheng suddenly came to Sang Changxia. On May 5, 2009, earthworms sang and the king melon was born. On may 2, 2009, kloc-0/,bitter vegetables appeared, grass died and the summer heat ended. On June 5, 2009, Mantis began to sing, and her tongue was silent. On July 7, 2009, the wind came to the cricket's home, and the eagle was learning the heat of summer. On July 23, 2009, rotten grass turned into fireflies, and it rained in summer. On August 7, 2009, the autumn was crisp, the dew fell, and cicadas sang in the heat. On August 23, 2009, the eagle was offering sacrifices to birds, and heaven and earth began to climb the white dew. On September 7, 2009, Hongyan came to the mysterious flock and returned to the flock to raise her shame. On September 23, 2009, the thunder began to stop, insects began to grow and the water began to dry up. On October 8, 2009/KLOC-0, guests from Hongyan attacked the water, and chrysanthemums blossomed. The first frost, 2009,65438+2009123 October, is a sacrifice to animals, plants, trees, yellow leaves, stinging insects and salt water. On October 7th, 2009/KLOC-0, water began to freeze. 65438+1October 22 rainbow failed to see the weather, and the decline of ground air was blocked, resulting in heavy snow in winter. February 7, 2009 65438+February 22, 2009, the birds stopped singing and the apples began to cross. 65438+On February 22, 2009, on the solstice of winter, the earthworm knotted the horns of elk to relieve stagnant water, and the spring was slightly cold. 20 10 10/5/0 On 20/0, the geese began to nest, and the chickens began to suck, and the birds suffered from serious diseases. On 4 February, 2065 438+00 in beginning of spring, the east wind thawed the stinging insects and the fish began to freeze.