Ключевые слова: 22, air, arc, atmosphere, atmospheric, bright, circle, circular, cold, color, colorful, colour, crystals, degree, encircle, environment, eye, flare, glow, halo, haze, ice, illusion, landscape, light, meteorology, mountains, natural, nature, optical, optics, parhelic, parry, phenomenon, rainbow, rare, refraction, science, shiny, sky, snow, sun, sun halo, sundog, sunlight, sunshine, tangent, tangent arc, weather, winter,