The appearance of beautiful shape clouds like flying saucer, pea . always makes viewers extremely excited.

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Pea-shaped clouds are often formed by gravity waves.

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They often look like flying saucers, making many people mistakenly believe that pea-shaped clouds are alien flying saucers.

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Mammatus clouds are always accompanied by strong winds.

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Mammatus clouds often appear in warm summer months.

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Notilucent clouds of iridescent color often form in very low temperature conditions, below minus 78 degrees Celsius.

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The Notilucent cloud is well versed from frozen water crystals and is the highest cloud in the Earth's atmosphere.

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The cloud is called "cloud of Kelvin-Helmholtz wave".

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Cloud curled up in the sky of Sydney city, Australia.

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Morning Glory clouds are a special and rare form of round clouds. They are often seen on Cape York Peninsula, a remote area of ​​Australia.

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The "cloudy mountains" in Sahara.

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Ash and steam rise from the Sarychev crater, in the northwestern Kuril Islands, "devour" a cloud.

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Clouds form in the storm Bertha observed from the International Space Station (ISS).