n00b65 Posted:

Because we live on the planet Earth, which is mostly covered by water. The color of the sky is the reflection of the dominant land color off of some layer of atmosphere (not sure which one). On Mars, due to the primacy of red sand, the sky would be red. And so on.

lol you are wrong!

It’s Rayleigh scattering. The gas molecules in the air absorb the blue light then scatter it everywhere. So wherever you look in the sky, it is blue. That’s why the sunset is red as well, because as the sun becomes more horizontal to your position, the light has to pbum through more air to reach your eyes, so more of the blue is scattered and the longer wavelength red colors pbum through.

Good day.