SAN FRANCISCO (KGO) -- Have you ever seen a halo-effect or ring around the moon? Known as a moon ring, a winter halo, or a 22-degree halo, it's when "ice crystals suspended high above in thin wispy ...

On Reddit, users located as far as the U.K. also reported seeing the ghostly phenomenon. A moon halo is actually an atmospheric optical illusion that causes a large, bright ring to surround our ...

The visual effect is known as a lunar halo or a 22-degree halo, and it's caused by light from the moon hitting millions of tiny ice crystals when high-altitude, wispy clouds cover much of the sky, ...

Residents woke up baffled after seeing a strange and eerie "ring of light" surrounding the moon. Margate resident Jessica Mayoh posted a picture of the glowing circle in an attempt to find out what it ...

An eerily-perfect ring of light was spotted around the full moon in Florida during the recent launch of a SpaceX Falcon 9 rocket, creating a stunning new photo. When you purchase through links on our ...