Known as a moon halo or 22-degree halo, the phenomenon is surprisingly common. “A halo forms when light passes through ice ...

Known as a moon ring, a winter halo, or a 22-degree halo, it's when "ice crystals suspended high above in thin wispy cirrus clouds refract the moon's light to form a perfect circle," Meteorologist ...

Weather folklore says a ring around the moon means rain is coming soon, and that does sometimes play out because cirrus clouds do come a day or so ahead of some low-pressure systems, which can ...