a bright spot in the sky that looks like a sun and is at the same height as the sun, but appears opposite it

The anthelion is a rare optical phenomenon. 幻日是一种罕见的视觉现象。

Anthelia are caused by the refraction of light through ice crystals in high cloud. 幻日现象是光通过高空云层中的冰晶发生折射而引起的。