What causes rainbow colors in clouds

Many mention of iridescent clouds of ice crystals, caused by glow of different gases and chemical compounds caused by ozone holes.

Sometimes these chemical changes in the atmosphere can be a characteristic sign of the impact of various anomalies including the UFO phenomena.

Sky watchers sometimes report seeing rainbow colors within clouds. These colorful clouds are called iridescent clouds. When you see a cloud like this, you know there are especially tiny ice crystals or water droplets in the air. Larger ice crystals produce solar or lunar halos, but tiny ice crystals or water droplets cause light to be diffracted – spread out – creating this rainbow-like effect in the clouds.

The images on this page are mostly via EarthSky their friends on Facebook and Google+

Read more about iridescent clouds on Les Cowley’s great website Atmospheric Optics