The sky is not blue!

The sky appears to be blue under the light of the sun, because the earth’s atmosphere diffuses more light with a short wavelength…
in relation to what has a longer wavelength.
The sky is not blue!The various wavelengths of the solar light (i.e. the various colors that compose it) are scattered, i.e., reflected in multiple directions on the molecules of the materials that constitute the atmosphere. The blue light has a shorter wavelength in the whole visible spectrum (the set of colors perceived by the human) and so diffuses more of the atmosphere in relation with all the other colors that you can distinguish the man. This has as a result the human eye to perceive any part of the sky, painted blue.
To put it simply, the molecules in the air act like little mirrors that reflect the various colors of light and selectively more blue.
If we could get together for a little while on the moon, or somewhere else in space, our sun would have a white color, while the sky (space) it would look dark. This is because in space there is no the earth’s atmosphere and so the light is diffused. The Earth still looks blue and the Moon.