Cloud spiral in the sky.
The phenomenon was observed early am 18 Oct 2009 but is an artists rendition.
Iridescent clouds are a diffraction phenomenon cause by small water droplets or small ice crystals individually scattering light. Larger ice crystals produce halos, which are a refraction phenomena rather than iridescence. Iridescence should similarly be distinguished from the refraction in larger raindrops that makes a rainbow. If parts of clouds have small droplets or crystals of similar size, their cumulative effect is seen as colors. The cloud must be optically thin, so that most rays encounter only a single droplet. Iridescence is therefore mostly seen at cloud edges or in semi-transparent clouds, and newly forming clouds produce the brightest and most colorful iridescence.
Photo below is the real deal. Both images are beautiful, though only one of them is real. One must wonder why people feel compelled to pass off works of art as real images to awe others.