The sky is blue. So why are clouds white? And if regular clouds are white, why are rain clouds gray? ... There’s one way to turn white, or any color, into black: turn off the lights.

HIGH POINT, N.C. (WGHP) — When there are dark clouds on the horizon, you know that a storm is coming — but why? Kenn from Mount Gilead wrote in to ask, “I’ve always wondered, why are so… ...

This space wallpaper shows an unusual sky field in the Milky Way band. It is centred on one of the classical, dark globules, known as Barnard 68 (B68) after the American astronomer, Edward E ...