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 ...

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 ...

It has to do with the way light scatters. By Kenneth Chang To understand how smoke from Canadian wildfires is turning skies in many places orange this week, it helps to first ask: Why is the sky ...

Northern lights ignite night sky after rare double solar eruption; Sun 'hole' expected to produce intense auroras tonight, ... and the color of that light depends on which element is being excited.

As a consequence, the blue and green colors dominate the scattered light, giving rise to the distinct green hue that colors the sky. This scattering is known as Rayleigh scattering.