The color of the sky has to be studied in connection with the theory of light, and as this was not well understood by the ancients, we find scientific theories of the colors of natural objects ...

The sky's default color is blue, but sometimes it looks purple, green, or even orange. Powerful storms and disasters, from tornadoes to wildfires, are creating surreal colors in the sky.

Called a cyanometer, it is a color wheel featuring 53 different colors for the observer to compare to the sky. A modern version of a cyanometer. (Image credit: Daniel Brown) Ozone blue at twilight ...

ST. LOUIS – The sky is always changing colors—from a bright blue on a clear day, to red and orange sunrises or sunsets, or multiple colors of a rainbow—there’s a lot going on that we don ...

The higher-energy colors with shorter wavelengths — that is, blue light — scatter more readily, and as a result, the entire sky is suffused in blue.

ST. LOUIS – The sky is always changing colors—from a bright blue on a clear day, to red and orange sunrises or sunsets, or multiple colors of a rainbow—there’s a lot going on that we don ...

This gorgeous eight-hour exposure reveals the colors of stars as they make their way across the night sky, colors that can inform astronomers about the characteristics of each star.