The Noctilucent Clouds

Noctilucent clouds, also known as polar mesospheric clouds (PMC), are a rare and fascinating meteorological phenomenon. They are luminous cloud formations that occur in the mesosphere, the Earth's highest atmospheric layer, at altitudes of around 76 to 85 kilometers (47 to 53 miles) above the surface. Noctilucent clouds are primarily observed in high-latitude regions, such as the polar regions, during the summer months.