anthelion
noun [ C ] environment specialized uk/æntˈhiː.li.ən/ us/æntˈhiː.li.ən/ anthelia /æntˈhiː.li.ə/ /æntˈhiː.li.ə/
幻日，反假日
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。
- More examples
- A very uncommon halo phenomenon is the anthelion, whose name means “against the sun."
- Anthelia were observed by Captain Scoresby in the Greenland Sea.
- In the photographs, the anthelion is the white spot on the parhelic circle opposite the sun.