Traditional Culture Encyclopedia - The 24 Solar Terms - The sun after the change of solar terms
The sun after the change of solar terms
The earth's revolution and rotation form the ecliptic angle, which results in the periodic change of the direct direction of the sun between the tropic of cancer, as well as the periodic change of climate, the length of day and night and the height of the sun.
Summer is the season with the longest day and the highest sun at noon. Starting from beginning of spring (February 4th or 5th), Changxia (May 5th or 6th), beginning of autumn (August 7th or 8th) and beginning of winter (165438+1October 7th or 8th) among the 24 solar terms.
The movement of the earth in the orbit of revolution will produce regular changes in weather and seasons, and farmers in traditional agriculture will carry out agricultural production accordingly, just like the proverb "Grain Rain planted melons and beans before and after".
The ecliptic angle is the direct cause of the astronomical season. This is because:
The distribution of noon sun height with latitude is as follows: low latitude is large, high latitude is small, and the spring and autumn equinox decreases from equator to poles; In summer solstice, it decreases from the tropic of cancer to the north and south sides; In winter solstice, it decreases from the tropic of Capricorn to the north and south sides.
The seasonal variation is: north of the Tropic of Cancer, the height of the sun reaches the maximum from summer to noon, and reaches the minimum from winter to noon. South of the Tropic of Capricorn is the opposite. Between the Tropic of Cancer, there is direct sunlight twice a year.
- Related articles
- How to get the plum blossom gift box in Bai Jing, Jiangnan?
- Which brand of chopping board is good for the language of chopsticks with two guns?
- How to find the parameter setting of pneumatic fixture of CNC lathe
- Health Tips of Turtle and Ling Paste for Summer Festival
- How do novices learn yoga?
- Henan Spring Festival Evening Program
- Small knowledge of family safety for the elderly
- The longest and shortest days in Hebei.
- 1 1 excelle 1.6 when driving automatically, the fault light is on and the acceleration is weak.
- Causes of high idle speed of EFI motorcycle