Water molecules and ice crystals in the atmosphere will refract sunlight.

Some people think that the earth's atmosphere is a layer of air. The higher it is, the thinner it is and the colder it is. Although the atmosphere is really thin, it is composed of different layers, and the outer layer is much hotter than the earth's surface. NASA has a detailed description of each layer of the atmosphere, with links to pictures of each layer.

Without the sun to start the evaporation process, there would be no water circulation. There will be no clouds, rain or other climatic phenomena. The water on the earth will be stagnant or even solid, because without the temperature of the sun, the earth will freeze completely.

Ten natural wonders in the sky: ice crystals refract sunlight to form solar halo

The ice crystal image is a prism that refracts sunlight at an angle of not less than 22 degrees, thus forming a 22-day halo as shown in the figure. The inner area of the halo will be slightly darker because the sunlight is refracted away. The reason for the formation of solar halo is the appearance of cirrostratus composed of ice crystals at a height of 5000m. The ice crystals in cirrostratus will undergo physical changes such as refraction and reflection after being irradiated by the sun, which will decompose the sun into red, yellow, green, purple and other colors, thus a huge colorful halo will appear around the sun, which is called solar halo. The appearance of solar halo often indicates that the weather will change to some extent. (Angelie Liu)