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

You may have noticed these as a tiny rainbow spot in the sky. I get questions about these ... to blue on the outside of the Sun dog. According to Georgia State University, the red appears sharper ...

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