Answer
Jun 06, 2025 - 10:36 AM
The ring around the moon, often referred to as a lunar halo, is an optical phenomenon caused by the refraction, reflection, and dispersion of light through ice crystals in cirrus or cirrostratus clouds in the upper atmosphere. These ice crystals bend the moonlight to create a circle of light with a 22-degree radius around the moon. Lunar halos are often associated with incoming weather systems, indicating that rain or snow might be on the way.