Rainbow circle revolves around the sun. What is this? (natural wonders)

Ri yun (solar halo; Solar flare is an atmospheric optical phenomenon, which is formed by the refraction or reflection of ice crystals when sunlight passes through the cirrostratus. When light enters the ice crystals in cirrostratus, it is refracted twice and dispersed into light of various colors in different directions. When there is cirrostratus, there are countless ice crystals floating in the sky. Ice crystals in the same circle around the sun can refract the same color light into our eyes, forming a halo of internal infrared violet. When there is a cirrostratus composed of ice crystals in the sky, one or more colored rings with the sun as the center and infrared violet inside often appear around the sun, and sometimes there are many colored or white spots and arcs, which are collectively called halos.

Solar halo is a light phenomenon formed by refraction when sunlight passes through ice crystals in clouds, which surrounds the sun in a ring shape and is colored. The appearance of solar halo often indicates that the weather will change to some extent. Solar halo is a rare astronomical phenomenon. "Solar halo" includes total halo and gap halo. Halo is a colorful (or white) halo or light arc around the sun formed by cirrus clouds and cirrostratus, and the color bands are arranged in infrared purple. Solar halos are sometimes called "sun flail", including total halos and intermittent halos. According to experts, the solar halo is formed by the refraction or reflection of ice crystals when sunlight passes through cirrostratus. When light enters the ice crystals in cirrostratus, it is refracted twice and dispersed into light of various colors in different directions. In fact, when there is cirrostratus, there are countless ice crystals floating in the sky. The ice crystals in the same circle around the sun can refract the light of the same color into our eyes, forming an internal infrared purple halo. When cirrostratus composed of ice crystals appears in the sky, one or more colored rings often appear around the sun, and sometimes many colored or white spots and arcs appear, which are collectively called halo.

When the viewing angle corresponding to the solar halo radius is between 22 and 46, people can observe the phenomenon of "solar halo" with the naked eye. The greater the ice crystal content in the cloud, the smaller the "halo" shape after sunlight refraction, and the more obvious the halo, which is convenient for people to observe; On the other hand, a "solar halo" cannot be formed, or even if it is formed, it cannot be clearly observed on the ground. "Dizziness" mostly occurs in spring and summer. There is a folk proverb called "the sun is dizzy in the middle of the night and the moon is dizzy at noon", which means that if there is a solar halo, it will rain in the middle of the night, and if there is a lunar halo, it will be windy at noon the next day. Solar halo can be a precursor of weather change to a certain extent, and it may turn cloudy or rain when it appears. But there is no scientific basis to say that this phenomenon can predict the drought and flood of this year's climate. Don't watch with the naked eye for a long time when the solar halo appears, so as not to burn your eyes.

When it's going to rain, cirrus clouds like bird feathers often appear in the sky, and then a rainy cirrostratus appears in the air about 6 kilometers below the cirrus clouds. Due to the low temperature, the water droplets in the cloud become small ice crystals in the shape of hexagonal prisms. When the sun's light energy passes through the clouds, it is refracted on small ice crystals. It seems that there is a circle around the sun, which is red, orange, yellow, green, blue and purple from the inside out. This is a solar halo.