Bright and dazzling, waves radiating rainbow colors sweep across the northern skies of Sweden, displaying beautiful hues. Known as "nacreous clouds" or "mother-of-pearl clouds," these clouds are a ...

Also known as nacreous clouds or “mother-of-pearl clouds”, they form during winter and early spring in the polar stratosphere, the second-lowest layer of Earth’s atmosphere, which is ...

It is most visible in high-latitude regions like Antarctica and southern Australia. Nacreous clouds, also known as "mother-of-pearl" clouds, are high-altitude clouds that form in the stratosphere ...