On Christmas, Muscovites have witnessed a rare natural phenomenon – light pillars in the sky. This is a kind of optical phenomenon which is formed by the reflection of sunlight or moonlight by ice crystals that are present in the Earth’s atmosphere.
On Christmas, Muscovites have witnessed a rare natural phenomenon – light pillars in the sky. This is a kind of optical phenomenon which is formed by the reflection of sunlight or moonlight by ice crystals that are present in the Earth’s atmosphere.