Sun pillars form when sunlight (or another bright light source) reflects off the surfaces of millions of falling ice crystals associated ... ... <看更多>

Sun Pillar with Upper Tangent Arc This was not a typical sun pillar. Just after sunrise two weeks ago in Providence, Rhode Island, USA, a photographer,... ... <看更多>

Sun pillars, or light pillars, are caused by ice crystals drifting in Earth's air, creating shafts of light extending from the sun or other bright light sources ... ... <看更多>