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 ...

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

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