triple sun

The tag 'triple sun' refers to a rare atmospheric optical phenomenon known as a sun dog or phantom sun, where ice crystals in the air refract sunlight to create the illusion of multiple suns. On WindowsForum.com, this tag is used in a thread discussing a video of a triple sun event observed over Changchun, China. The thread explains that the phenomenon is caused by ice crystals in winter clouds refracting light, producing two smaller suns on either side of the real sun along with a rainbow-like aura. This tag is relevant for users interested in unusual weather phenomena, atmospheric optics, or viral videos of natural events.