There is a regular in the top of the pad na atmosphere near the surface world as mist. Gray cannot see the Sun or the moon. Does not cause the light rings (Halo), except when there is a very low temperatures may occur.
It is a thick sheet Uniform layer of atmosphere below Near the Earth's surface like a gray fog invisible sun or moon. Not cause the light (Halo), except when the temperature is very low, it may happen.
The thick, uniform in the class of the atmosphere near the earth's surface like fog, gray and see the sun or moon, do not cause the light. (Halo), except when the temperature is very low, it could happen.