According to Wang, a sundog, or known scientifically as a perihelion, is a common bright circular spot on a solar halo. It's an atmospheric optical phenomenon primarily associated with the reflection or refraction of sunlight by small ice crystals making up cirrus or cirrostratus clouds.
However, the professor added that on that night the region shouldn't have had any sundogs.
"It's quite strange," Wang said.
He suggested that more photos taken from different areas and more witness reports are needed to solve the mystery.I've never heard of a triple sundog, but perhaps it's possible? To read the rest of the article, click here.