Noctilucent Cloud Collection

Noctilucent cloud over trees. This type of cloud, also known as polar mesospheric, is visible only in deep twilight and is seen mostly during the summer

Polar mesospheric clouds, ISS image. Photograph of polar mesospheric clouds from the northern hemisphere taken by astronauts aboard the International Space Station (ISS)

Earths atmosphere, diagram
Earths atmosphere. Block diagram showing altitude in kilometres (km) and phenomena observed in Earths atmosphere. This profile ranges from ground level (at the Ganges Plain and Tibetan Plateau)

Noctilucent clouds with Moon
Noctilucent cloud with the Moon. These bright displays are seen in the middle of the night in summer at high latitudes. Their composition is unknown

Noctilucent clouds, herring structure
Noctilucent cloud. These bright displays are seen in the middle of the night in summer at high latitudes. Seen here is an unusual crossed pattern, known as the " herring" structure

Noctilucent clouds, ISS image
Noctilucent clouds. International Space Station (ISS) image of the limb of the Earth, showing noctilucent clouds (polar mesospheric clouds, across top) in the upper atmosphere

Noctilucent cloud over a city by a river. This type of cloud, also known as polar mesospheric, is visible only in deep twilight and is seen mostly during the summer

Noctilucent cloud over a lake. This type of cloud, also known as polar mesospheric, is visible only in deep twilight and is seen mostly during the summer

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Noctilucent clouds, also known as polar mesospheric clouds, are a mesmerizing phenomenon that grace the Earth's atmosphere. These ethereal formations can be seen in this captivating ISS image, showcasing their delicate beauty against the backdrop of space. As depicted in the diagram of Earth's atmosphere, noctilucent clouds occur at high altitudes in the mesosphere. They form when water vapor freezes around dust particles and ice crystals, creating stunning displays of luminosity during twilight hours. In one enchanting scene, we witness these noctilucent clouds illuminated by the gentle glow of the Moon. Their intricate herring structure adds an extra layer of mystique to their already captivating presence. Another breathtaking image from the International Space Station captures these elusive clouds floating gracefully above our planet. The contrast between their radiant appearance and the dark expanse of space is truly awe-inspiring. Whether observed over a city or amidst nature's grandeur, noctilucent clouds never fail to leave us spellbound. Their luminescence casts an otherworldly glow over urban landscapes, transforming ordinary nights into extraordinary experiences. Noctilucent clouds possess an undeniable allure that continues to captivate skywatchers worldwide. As they dance across our skies like celestial brushstrokes on a canvas, each sighting reminds us of nature's ability to create wonders beyond imagination.