Noctilucent clouds are the highest clouds in the atmosphere and are only visible under specific conditions. Here we explore the strange clouds in more detail.. Download and use 400,000+ Night Clouds stock photos for free. Thousands of new images every day Completely Free to Use High-quality videos and images from Pexels
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Noctilucent clouds are defined as high-level clouds forming after sunset at an altitude of approximately 80 km or 50 miles. Also known as night-shining clouds, they occur when sunlight below the horizon illuminates and reflects off ice crystals in the mesosphere, resulting in a blue or silver hue.. Noctilucent clouds are extremely rare very high clouds seen in the night sky, usually on clear, summer nights.
