The historical origin of whether the days become longer or shorter from summer to the future.

Is the day longer or shorter after the summer solstice?

The day from the summer solstice has the longest sunshine. After that, the duration of a day began to shorten gradually, so this day had a great influence on agriculture from summer to Sunday, and what we could do during the day became much more. The longest day and the shortest night. On the day of summer solstice, the sun shines directly on the tropic of cancer. At noon, the height angle of the sun is 90 degrees, with the longest day and the shortest night in a year. After the summer solstice, the direct point of the sun moves south from the Tropic of Cancer, and the day becomes shorter.

Historical origin of summer solstice

The change and determination of summer solstice is basically determined by the sun, and the change of summer solstice is also inseparable from sunshine hours, temperature and sun height. The summer solstice solar term is the earliest of the 24 solar terms. In the 7th century BC, the shadow of the sun was measured by civil soil gauge, thus the summer solstice was determined. The annual summer solstice begins on June 2 1 and ends on July 7. According to the manuscript of Abiding by the Constitution, it is called the summer solstice, because the sun is in the north, and the days are long and the shadows are short. Do your best. On the summer solstice, how much is the direct sunlight on the ground in a year? At the northernmost point, the day is the longest, and the farther north, the longer the day.

Stories of summer solstice

"Summer Solstice" song Zhang Lei. Long-term support has been excellent, and the Universiade has changed suddenly. The world is full of unknowns, and the gloom gives birth to nine plains. The life of killing people suddenly becomes more difficult, and it will grow up in cold and hot. Cui Wei is a dry cloud tree. It keeps its fragrance fresh. A few things are ignored, and gradual reason is inevitable. For a year, Hua Guanzi sat silently and forgot his words. Song Chen's two summer poems shared a room with imperial academy. Bright waves and thousands of willows, the house is opposite to the lotus. New things change, which means more scenes. Fish gather in the pavilion, and the mirror scatters micro-vortex. The rivers and lakes are far away, and the rain we owe is almost gone. Suddenly I saw the bird with an arrow, and I sighed helplessly. "Summer Solstice" Fan Song Chengda. Li He bowed his waist and blessed him, while Zong Si tied his arms and helped him. Festive events compete with local customs, and old people are idle and playful.