Astronomy experts later explained that this striking display was not science fiction, but a natural atmospheric phenomenon known as paraselene, commonly called ‘moon dogs’ or ‘mock moons.’ Russia’s state news agency RT also shared footage of the event, adding to the growing public fascination.
According to scientists, moon dogs appear when moonlight passes through tiny ice crystals floating high in the cold air. These crystals bend and reflect the light at just the right angle, forming extra bright patches on either side of the moon. The result is a visual trick that makes the sky look fuller and more dramatic than usual.
Experts note that paraselene usually form about 22 degrees away from the moon and are much fainter than the real moon. They are easier to see when the moon is low on the horizon, as its softer glow allows these light spots to stand out more clearly.
The astronomy group Sky Brary explains that these glowing patches always appear at the same height as the moon, just above the horizon. Their shape and brightness depend on how the ice crystals are positioned and how much they move in the clouds. Larger crystals can stretch the light into tall, glowing pillars, making the scene even more eye catching.
While moon dogs are related to sun dogs, which appear during the day, seeing multiple moon dogs at the same time is extremely rare. This is what made the Saint Petersburg event so special several paraselene appeared together, giving the sky the look of four moons shining at once.
Scientists say moments like this are a gentle reminder of how weather and light can quietly transform an ordinary night into something unforgettable. For those lucky enough to witness it, the evening became a moment of calm wonder one that will stay in memory long after the lights in the sky faded away.
