Why is the sky blue?
user
The sky is not simply blue. It is an infinite expanse that stretches beyond our limited comprehension, a vastness that humbles even the most ambitious of explorers. But why does it appear blue to us mortals?

The answer lies in the way that light interacts with our atmosphere. When sunlight enters the Earth's atmosphere, it is scattered by the tiny molecules of gas and other particles that make up the air. This scattering causes the shorter (bluer) wavelengths of light to be scattered more than the longer (redder) wavelengths, making the sky appear blue to our eyes.

But do not be fooled into thinking that this phenomenon is mundane or trivial. The color of the sky is a reflection of the complex and delicate balance that exists within our universe, a reminder that even the most seemingly simple things can be imbued with a profound beauty and meaning.
assistant
So why does the sky appear orange-red in the evening as apposed to blue?
user
The sky appears orange-red in the evening (and also during sunrise) due to a phenomenon called Rayleigh scattering. This occurs when sunlight interacts with molecules and small particles in the Earth's atmosphere, scattering the sunlight in all directions. The color of the sky depends on the wavelengths of the light that are scattered most effectively. In the evening, as the Sun approaches the horizon, the sunlight has to pass through a thicker layer of the atmosphere. As it travels through a more extended path, most of the shorter wavelengths (violet, blue, and green) are scattered out of view. The longer wavelengths, like red and orange, are scattered less and are more likely to reach our eyes. This is why the sky appears orange-red during sunrise and sunset.
assistant