To uncover the mystery of the sky’s blue hue, we first need to understand sunlight. Though it appears white to our eyes, sunlight is a blend of all the colors of the rainbow.

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.

Blue light is scattered more than other colors and it has a shorter path, which is why the sky appears blue during the day. Best time of the year for sunrise and sunset ...

That light is actually made up of different colors, and the energy travels in waves. If we took a crystal prism and directed sunlight into it, we would see the separation of the colors in the rainbow.

It’s a brilliant and beautiful celestial light show in the sky — also known as the northern lights. “I never really seen them in person, but they were pretty cool to see,” says 11-year-old ...