The halo of the sun rainbow? What does a rainbow around the sun sign?

You're talking about a solar halo.

日halo (rì yùn) (solar halo; Solar Flare), a halo is a light phenomenon formed by the refraction of sunlight through ice crystals in the clouds, which rings around the sun and is colored. The appearance of solar halos often indicates that the weather will change to a certain extent. The solar halo is a relatively rare celestial phenomenon.

"Solar halo" has full halo and notched halo.

A heliosis is a colored or white halo or arc of light formed by cirrus clouds and cirrostratus clouds that surrounds the sun, and the color bands are arranged in the inner infrared violet. Solar halos, sometimes referred to as "flails", have full halos and notched halos. According to experts, solar halo is an atmospheric optical phenomenon that is formed by the refraction or reflection of ice crystals when sunlight passes through cirrostratus clouds.

When light hits the ice crystals in the cirrostratus clouds, it is refracted twice and dispersed into various colors of light in different directions. In fact, when there are cirrostratus clouds, there are countless ice crystals floating in the sky, and the ice crystals in the same circle around the sun can refract light of the same color into our eyes, forming an inner infrared violet halo. When there are cirrostratus clouds composed of ice crystals in the sky, one or more colored rings of infrared violet light with the sun as the center often appear around the sun, and sometimes many colored or white light spots and arcs of light appear, which are collectively called halos.

It is the solar halo, and there is another one, called the moon halo, which is the same principle as the solar halo.

The legendary circle of the sun's rainbow, also known as the "halo", is formed by the refraction, reflection, and scattering of light in the atmosphere. When it appears open, it is often seen as a sign that the weather is about to change. Therefore, there are many folk sayings about the auspiciousness of the rainbow around the sun.

In general, a rainbow around the sun is considered a bad omen. Because when it appears, the weather usually changes greatly, and extreme weather such as heavy rain and storms may occur, which will have an unfavorable impact on agriculture and transportation. In addition, the sun's circle of rainbows is also considered a warning from the heavenly gods, indicating that some ominous event is about to happen.

However, there are also some people who believe that the sun's circle of rainbows also has an auspicious significance. Because when it appears, it often brings a beautiful sight, and many people are attracted by its beauty. In addition, the circle of the sun and the rainbow is also considered a mysterious astronomical phenomenon, and its appearance may lead to in-depth study and exploration of the natural sciences.

A rainbow that circles around the sun is often referred to as a halo or halo. They are optical phenomena produced by the reflection and refraction of light rays in water droplets or ice crystals, which can be seen in the sky under specific weather conditions. Halos usually have some characteristics like the shape of the ring, color bands, brightness, etc.

These features are caused by the different reflections and refractions of light that occur in ice crystals or water droplets.

Halos can also be further classified based on their color and shape. For example, in a circular halo, the inner circle is often blue and purple, gradually changing to green and yellow outward, with the outermost ring being red. This halo is known as a variegated halo.

When the sun is below the horizon, the bands of light that form are called horizon halos or horizon bands.

In conclusion, the rainbow that circles the sun is often referred to as halos or halos, and they are a beautiful and peculiar natural phenomenon. During the observation process, it is necessary to pay attention to the protection of the eyes to avoid optical damage caused by looking directly at the sun. It is also important to observe the weather conditions in order to better observe and experience this natural wonder.