sundog

1.A solar phenomenon known as a sundog arcs over the tundra in Churchill, Manitoba, Canada.

/ 太阳的“假日”天文现象半悬于拿大Manitoba丘吉尔苔原的天际。

2.Analogous to a sundog or parhelion, the paraselene is produced by moonlight shining through thin, hexagonal-shaped ice crystals in high cirrus clouds.

类似环日的形成一样，在高空卷云中，月光通过稀薄、具有六边形状的冰晶时产生了幻月。