Watch: This photographer's footage of a double rainbow, as seen from a trail in the Golden Gate National Recreation Area, ...

Fire rainbows, a phenomenon that captivates both the eye and the imagination, are a rare sight in the sky. When these ...

As Venus approaches its inferior conjunction, astrophotographers have snapped some striking shots of the crescent planet ...

Light at the blue end of the rainbow is scattered ... and they prefer the blue ones over the other colours. The result is that the blue light is scattered across the sky so you see blue everywhere ...