It might seem like a simple question. But the science behind a blue sky isn't that easy. For starters, it involves something ...

The sky isn't just blue by chance. It takes all the colors of the rainbow for us to see it that way. It happens because of something called the Rayleigh effect, or Rayleigh scattering, named after ...

Sunlight comes to Earth in a rainbow of colors. We also see the Rayleigh effect at play in: -S unsets where the sky is red. Light has to pass through a larger part of the atmosphere when the sun ...