Why does the moon have a halo?

The halo of the moon is a halo. Also known as the "wind circle", moonlight is refracted by clouds, forming an aperture around the moon, which can be used as a sign of weather changes. Before the weather changes, sometimes one or more colored or white apertures are seen around the sun or the moon, and the sunlight and the moon light look dim.

This kind of aperture around the sun or moon is called "halo". The aperture around the sun is called "solar halo" and the aperture around the moon is called "lunar halo". This is a strange meteorological phenomenon. The color of halo is generally infrared violet.

Halo-the phenomenon that moonlight refracts when it passes through ice crystals in clouds. The color is dizzy, and the interior is infrared purple.

The appearance of solar halo or lunar halo often indicates that the weather will change to a certain extent. Generally speaking, a solar halo means it may rain, while more lunar halos mean it will be windy. So there is a folk proverb: "The sun is dizzy in the middle of the night and the moon is dizzy at noon."

In ancient times, the lunar halo was called the hairy moon.