What's another name for the sky?

Other names of the sky are blue sky, nine days, sky, heavy sky and lonely people.

The reason why the sky is blue is that sunlight is made up of seven kinds of light. Of the seven kinds of light, green, cyan, blue and purple have higher frequencies, and the light with higher frequencies is most easily scattered by air molecules and dust in the air, so when sunlight passes through the atmosphere, most of the four kinds of light are scattered.

If there is no atmosphere, the sun we see is a very dazzling fireball in the dark space background, and astronauts in the space station can see this scene. Because the sun is a star with a color temperature of about 5000K, its light tends to be yellow, so we often see the sun through the atmosphere.

The formation of the sky:

There are many forms of expression in the sky, which carries the fastest light known to mankind and is the most primitive creative enlightener of mankind.

Various forms are usually expressed by weather, which refers to the specific state of the near-surface atmosphere in a short time. Weather phenomenon refers to various natural phenomena in the atmosphere, that is, the comprehensive expression of the spatial distribution of various meteorological elements in the atmosphere (such as temperature, pressure, humidity, wind, clouds, fog, rain, flash, snow, frost, thunder, hail, haze, etc.). ) in an instant.

Weather process is the process of weather phenomena changing with time in a certain area. All kinds of weather systems have certain time and space scales, and they are intertwined and influence each other.

The combination of many weather systems constitutes a large-scale weather situation and hemispheric and even global atmospheric circulation. The weather system is always in the process of rebirth, development and extinction, and there are corresponding weather phenomena in different development stages.