a bright spot that appears in the sky on either side of the sun, caused by the refraction (= bending) of light through ice crystals in high cloud

Parhelia usually appear as two bright spots either side of the sun at about 22°. 幻日通常是在太阳两侧22 ° 处出现的两个亮点。

Look at this incredible image of a parhelion. 看看这张令人难以置信的幻日照片。