Fire Rainbow

I recently saw a well publicized photo of a "fire rainbow" and thought it was amazing. Having never heard of a fire rainbow, I thought I'd do a little research and as it turns out, they're quite rare.

"A circumhorizontal arc, also known as a fire rainbow, is an optical phenomenon similar in appearance to a rainbow, caused by the refraction of light through the ice crystals in cirrus clouds. It occurs only when the sun is high in the sky, at least 58° above the horizon, and can only occur in cirrus clouds.

The phenomenon is quite rare because the ice crystals must be aligned horizontally (instead of the more typical vertical alignment) to reflect. It is often thought of as the rarest natural occurrence in the world." (Wikipedia)

Enjoy Ü