A large soap bubble" was registered in the sky near the Academic Varnadsky station.
Ukrainian polar researchers noticed a rare optical phenomenon - iridescence of cirrus clouds. It has the appearance of multi-colored overflows, similar to a soap bubble.
This effect occurs when sunlight interacts with small ice crystals in clouds. Then the light waves are placed on top of each other, creating color transitions.
These colors do not form a regular circle, but repeat the shape of the cloud itself.
Photo: Angelika Hanchuk / National Antarctic Science Center.