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 a ...

Before we can understand why the sky looks bluer in the fall, it's important to first know why the sky appears blue in the first place. The sun emits white light, and due to Rayleigh scattering (the ...

Look up! The sky takes on an extra-blue hue in the fall, because of low humidity and an increased amount of Rayleigh scattering.

Most of us have heard the weather proverb “red skies at night, sailors delight; red skies at morning, sailors take warning.” I certainly enjoy watching a beautiful red sunset, but for those of us in ...