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

The blue of the sky comes from Mars’ atmosphere and the ozone absorbing other colors. There's a ton of ... good at absorbing blue light. …the deep, rich shade of blue we now see at twilight ...

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 ...