How did the spectacle of solar halo come into being?

Ri yun (solar halo; Solar flare), solar flare is a light phenomenon formed by refraction of sunlight when it passes through ice crystals in clouds, and it is annular and colored around the sun. 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.

The spectacle of solar halo is an atmospheric optical phenomenon, which 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. When there is cirrostratus, there are countless ice crystals floating in the sky. All the ice crystals in the same circle around the sun can refract the light of the same color into people's eyes, forming a halo of internal infrared purple. 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.

Sometimes, there will be apertures around the sun or the moon, which are colorful. People call it "wind circle" and meteorology calls it halo. The aperture around the sun is called solar halo, and the aperture around the moon is called lunar halo. It is formed by the refraction or reflection of ice crystals when the light of the sun and the moon passes through the clouds. And this kind of ice crystal structure cloud is often produced when cold and warm air meet. Later, the clouds became thicker and developed into nimbostratus, so the halo was a sign of the coming storm. When there is a halo in the sky, the local distance is 600-700 kilometers from this layer of cloud. According to the moving speed of 40-50 kilometers per hour, it usually takes more than ten hours for the wind and rain to come after the halo appears. This is the truth that "the sun is dizzy on the third night and the moon is dizzy at noon". But it is not always stormy after each halo, but also according to the development of the cloud. Generally, it is less likely to rain when there is a lunar halo than when there is a solar halo, but it is mostly wind.