What makes the sky blue?

Why is the Sky Blue answer

The diameters of the molecules in the air have the same wavelengths as blue and green light. The N2, O2, CO2 molecules and Ar atoms act like little mirrors, if the molecules do not absorb sunlight , they reflect is in all different directions including toward the ground. This is why the sky seems to be an aquamarine color. Water molecules have larger diameter. That why clouds are white to gray to almost block if you have ever been walking or driving in Fog. Fog is a cloud o at ground level. 

The atmosphere is NOT emitting blue photons.. The reason the sky is blue is because of the the diameters of the molecules and atoms are equal to the wavelengths of blue and green light and this why blued green light is scattered in all directions. They are NOT emitting photons. They are REFLECTING and scattering blue AND green photons. . THAT is why the sky is blue. 

"...Rayleigh scattering 

The scattering of light by particles that are small in relation to the wavelength of the light. Rayleigh scattering of short wavelengths in sunlight by gas molecules in the atmosphere is the reason the sky appears blue. The phenomenon is named after the English physicist Lord Rayleigh (1842–1919). 

In Rayleigh scattering, the amount of scattering (d) is inversely proportional to the fourth power of the wavelength (λ). Thus blue light is scattered by small particles ten times as much as red light. ..." 

http://www.daviddarling.info/encyclopedi... 

https://en.wikipedia.org/wiki/Rayleigh_scattering

https://en.wikipedia.org/wiki/Mie_scattering