There's more, though. The short wavelength blue light of LEDs bounces around more in the sky, intensifying the brightness of light pollution more than an equivalent amount of less blue light energy.

The difference between how light behaves on Earth and how it travels in the emptiness of space, explains the beautiful blue skies and the vast darkness of space. Why is the sky blue in colour?

So this is the alpine sky in a box, and Tyndall had an explanation for why this happens. He knew that white light is made of all the colours of the rainbow and he proposed that the blue light has ...

I can't help but feel blue about the latest rumor that Apple's forthcoming iPhone 17 Air will take flight in a subtle, light-hued color called sky blue. Sky blue isn't a new color for Apple. It's the ...