Halo: near the sun and moon form a circle, wreaths and pillars

Rainbow circle that appears around the world, inside is painted in red. Outside, it acquires a bluish tint. Why am I seeing this vision? Floating in the air, ice crystals have a hexagonal shape. Rays of light passing through these prisms, split into red, green and blue rays. They are then stained with lights around the world in a certain color. When the sun run over cirrus clouds, the result of light refraction in ice crystals may be difficult halo. Halo has a complex form of several colored circles around the sun and three or four arched bridges over the surface horizon. This vision arises because in the air are not only hexagonal crystals, but the icy dust other form. When moving in the air a variety of crystals to refract differently through a solar light. Very rarely, during sunrise or sunset or the moon, we can see the columns above them. Such a halo is obtained by reflection of rays from the faces of horizontal crystals. During calm weather, this icy dust falls down and we see a glowing pillar in the sky. In severe frosts, but both sides of the sun may have two columns. The emergence of pillars said to strengthen the cold of this area. So that circles around the sun or moon may indicate a change in the weather, since cirrus clouds that contribute to the halo, often precede the appearance of a cyclone in the area.