Why does the sun have a circle today? What is next to the sun?

The circle around the sun has a special name in meteorology, called "halo". Obviously, the "halo" in this photo is caused by sunlight, so it is called "solar halo". Correspondingly, there is "moon halo".

When cirrostratus appears in the sky, it is easy to appear "halo". Because cirrostratus's uniform small ice crystals reflect sunlight at a specific angle. So this is a very beautiful ring. If the landlord pays attention, the halo radius must be 22 or 46, which is determined by the structure of small ice crystal particles.

Generally speaking, the appearance of "halo" is the change of weather, and cirrostratus is often the precursor of warm front. Therefore, there is a folk saying that the sun is dizzy in the middle of the night and the moon is dizzy at noon.

Related content explanation

The small light spot next to the sun is the glare produced by the repeated reflection of the camera lens. When shooting against a strong light source, it is easy to have similar photoelectricity. With the change of shooting angle, the angle of small spot will also change. But I don't recommend the landlord to do so, which will damage the CCD of the camera.

Remember the "end of the world" at the end of last year? Before that, many people just took pictures of the sun with their cameras. When they saw such a bright spot, they exclaimed that this is the doomsday planet NIBIRU, and they will come to the earth and hit the earth at the end of the year. Time will tell. This argument is obviously just a joke.