EntityQ205928· pop 21· linked from 25 articlescircumzenithal arcSign in to saveoptical phenomenon arising from refraction of sunlight through ice crystalsConnectionssun dogEntityTangent arcEntitySunConceptrainbowEntityfull moonEntityrefractionEntityzenithEntityhaloEntitycirrusEntityoptical dispersionEntityturbulenceEntitycirrostratusEntity22° haloEntityice crystalEntitycircumhorizontal arcEntityparhelic circleEntityvertical draftEntitycircumscribed haloEntityBBC News OnlineEntity46° haloEntityCategoriesAtmospheric optical phenomenaCommons link from WikidataGeometrical optics