Waves in the Sky

By: P-M Heden


Region: Europe

Site: Vallentuna - Sweden


Time-lapse video: ghostly clouds hover in the summer night sky of Sweden as the crescent Moon rises in the early morning hours. The noctilucent or night-shining clouds lie near the edge of space, reflecting sunlight from about 80 kilometers above Earth's surface. Usually spotted above the polar regions in summer. P-M Heden/

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