The ancient nickname of autumn
Autumn generally refers to autumn, which is one of the four seasons of "spring, summer, autumn and winter". In China, traditionally, the "beginning of autumn" in the 24 solar terms is the starting point of autumn. Autumn means rain, humidity, etc. Tending to decline or decrease, everything in nature began to mature from lush to bleak.
Autumn is the harvest season, and many plants mature in autumn. In autumn, in nature, Yin and Yang begin to change, Yang gradually recedes, Yin gradually grows, the climate turns from hot to cold, and everything comes into being with cold and gradually falls. This is the season of alternating hot and cold.
In autumn, the direct point of the sun gradually moves south from the northern hemisphere, passes through the equator after the autumnal equinox, and the sun directly shines in the southern hemisphere. Seen from the northern hemisphere, the angle of the sun gradually becomes lower, and the gap between day and night becomes smaller. At the autumnal equinox, the length of day and night is equal. In autumn, the distance between the earth and the sun is from far to near. Seen from the ecliptic plane, the sun is on the background of Leo, Virgo and Libra.
Beginning of autumn doesn't mean that the hot summer is coming, but the cool autumn is coming. Beginning of autumn is still in the hot summer period, and the hot summer will not come out until the second solar term (hot summer) in autumn, and the weather is still very hot in early autumn. The so-called "heat is in three volts", according to the calculation method of "three volts", beginning of autumn is often in the "three volts" period until summer, so the weather is still very hot in early autumn, and it will generally cool after the Millennium solar terms. The watershed of summer heat is in autumn, not at the turn of summer and autumn.