So the sky isn’t blue, at least not always. It is a glow-in-the-dark night sky too, colored a mix of green, yellow, and red. Its colors result from scattered sunlight, oxygen, and sodium from ...

On a clear, sunny day, we are met with blue skies. But on days of severe weather, it’s no surprise to be met with dark skies. Sometimes, it even appears green or yellow outside. Here’s a ...