Rare Lunar Phenomenon Lights Up Night Sky
A breathtaking 22-degree moon halo illuminated Karachi’s skies in the early hours of December 6, 2025, captivating stargazers as the last full moon of the year shone at 99% illumination. The striking optical phenomenon appeared as a perfect luminous ring around the waning gibbous moon, visible until dawn.
Science Behind the Spectacle
Meteorologists explain the halo forms when moonlight passes through high-altitude cirrostratus clouds (7-12 km above Earth), containing millions of hexagonal ice crystals. These crystals refract light at a precise 22-degree angle, creating the glowing circular effect. The phenomenon resembles a rainbow but occurs at night under specific atmospheric conditions.
Weather Implications of Lunar Halo
Beyond its visual splendor, the lunar halo serves as a natural weather indicator. The ice crystal formation often signals rising moisture in the upper atmosphere, potentially forecasting approaching rain or storm systems within the next 24-48 hours.
Public Reaction and Photography Frenzy
The celestial display sparked widespread excitement across Karachi, with amateur astronomers and casual observers alike capturing the phenomenon. Social media platforms were flooded with images of the ethereal moon ring, as residents shared their experiences of this rare astronomical event.
Rarity in Urban Environments
Skywatchers noted the particular significance of this sighting in Karachi, as light pollution typically makes such phenomena difficult to observe in major cities. The clear visibility of the halo made this occurrence especially noteworthy for urban astronomers.
