Why does the sky keep changing color? It keeps changing. Only a small area becomes red, purple, blue, green, and green becomes the deepest and largest area.

Phenomena is the manifestation of essence. The wonders in the atmosphere do not appear by chance; they are a reflection of the state of atmospheric motion. Therefore, changes in the wonders in the sky are often signs of changes in the atmosphere. The working people of our country have rich experience in using these phenomena to judge weather changes. For example, there is a proverb: "If you don't go out with the morning glow, you will travel thousands of miles with the sunset glow", which is to use the glow to predict the future weather. According to the generation principle of clouds, the appearance of bright red morning glow indicates that there are many water droplets in the atmosphere, and clouds have invaded the area from the west, thus indicating that the weather will turn rainy; the appearance of fiery red or golden sunset glow indicates that there are no clouds in the west. Only sunlight can pass through to create sunset glow, which means that the weather in the upper reaches of the area has cleared up. In this way, after the clouds that originally covered the area move eastward, the weather in the area will become clearer.

Another example is: "The sun rises in the east and the rain comes in the west." This proverb also infers whether the future weather will be sunny or rainy based on the direction of the rainbow. It can be seen from the principle of rainbow formation that the direction in which the rainbow appears is the direction in which water droplets exist. The rainbow is in the east, indicating that there are larger water droplets in the atmosphere to the east of us; the rainbow is in the west, indicating that there are larger water droplets in the atmosphere to the west of us. . Most areas of our country are in the westerly belt, and weather systems generally move from west to east. The cloud and rain areas in the east will move more and more eastward in the future, while the cloud and rain areas in the west can easily affect the local area. This experience reveals the nature of weather evolution.

Another example: "The sun's halo brings rain at midnight, and the moon's halo brings wind at noon." This proverb also reveals the nature of future weather changes based on the phenomenon of halo. We know that halos are formed due to refraction and reflection when light from the sun or moon passes through cirrostratus clouds composed of ice crystals in high altitudes. Cirrostratus clouds usually appear in the front of low pressure, and behind them are the altostratus and nimbostratus clouds that cause rainfall. If a low-pressure windy area passes through the local area, strong winds will occur. Of course, this proverb does not necessarily mean that the sun's halo indicates rain and the moon's halo indicates wind, it just means that wind and rain are coming.

In short, all scenes in the atmosphere are the result of atmospheric movement. Therefore, the weather can be predicted more scientifically through certain special scenes.