The Novaya Zemlya effect is a polar mirage caused by high refraction of sunlight between atmospheric thermal layers. The effect gives the impression that the sun is rising earlier than it actually should, and depending on the meteorological situation, the effect will present the Sun as a line or a square—sometimes referred to as the rectangular sun—made up of flattened hourglass shapes.
The Novaya Zemlya effect is a polar mirage caused by high refraction of sunlight between atmospheric thermal layers. The effect gives the impression that the sun is rising earlier than it actually should, and depending on the meteorological situation, the effect will present the Sun as a line or a square—sometimes referred to as the rectangular sun—made up of flattened hourglass shapes.
Source: Wikipedia "Novaya Zemlya effect" · CC BY-SA 4.0
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