“The Glory of the Pilot”
We see it all the time, but seldom perceive it fully. The rings of light appear in water vapor downsun (if it’s not a word, I am coining it now) from our position like rainbows in the mist. This optical phenomenon is called “glory” or the “Glory of the Pilot.” Though we don’t realize it until we get up close, our shadow is centered in the bullseye as we are positioned directly between the sun and this phenomenon. It occurs due to classical wave tunneling when light tunnels through air in water droplets and reflects back at the source.
The Aerial Horizon 