What is what does it mean when there is a ring around the moon?

When there is a ring around the moon, it is known as a lunar halo or moon ring. This phenomenon occurs when light from the moon is refracted or bent by high, thin cirrus clouds made of ice crystals in the upper atmosphere. These ice crystals act like tiny prisms, bending the light and creating a ring or halo around the moon.

Lunar halos are sometimes associated with approaching weather systems, as cirrus clouds often precede a storm. They are also believed to be a sign of impending moisture or precipitation. In folklore, a ring around the moon is known as a sign of bad weather coming soon.

Overall, a ring around the moon is a beautiful and enchanting natural phenomenon that can be observed on clear nights when the conditions are right.