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

If Earth had no atmosphere like the Moon there would be no scattering, and the sky would remain black, even in daylight ...

The sky isn't just blue by chance. It takes all the colors of the rainbow for us to ... That's because blue and violet light have the shortest, smallest wavelengths. Since the blue waves become ...

T he sky isn't just blue by chance. I t takes all the colors of the rainbow for us to ... scientist who first wrote about it in 1871. Light breaks over the horizon at sunrise, seen in a ...