There are a number of optical effects related to weather, besides rainbows . Although, rainbows are more common and recognized more often by the general population, other optical phenomena like coronas, iridescence, sundogs, auroras, haloes, mirages, and the green flash also exist.
Coronas are luminous rings of light around the sun or moon.
They're tinted with the colors of the spectrum, with red on the outside and violet on the inside. They're sometimes associated with a frontal system. The frontal system is also known as fronts, cold and warm. Fronts are boundaries between warm and cold air masses, which is why they are the agents of change in the weather. In the middle and high latitudes, fronts are zones where the atmosphere is at its most active.