Noctilucent clouds in the Antarctic sky

NASA spacecraft spotted a giant glowing glowing cloud circle at night above the Antarctic sky.

The AIM spacecraft photographed a luminous cloud circle in Antarctica on November 24 (photo: NASA).

The AIM spacecraft of the NASA Aerospace Agency (NASA) discovered the noctilucent cloud circle (NLC), or " glowing at night " clouds above the Antarctic sky since November 17. This is a seasonal cloud , often appearing in polar regions on summer nights in both hemispheres, according to Earth Sky.

Space Weather said the noctilucent clouds are the highest clouds, formed about 80 km from the surface of the Earth, the boundary area between the Earth's atmosphere and the aerospace. We see these clouds glow in the night sky because they are so high that they are still illuminated by the Sun, even when the Sun has set.

The high-floor atmosphere has a low temperature, causing steam to condense and freeze around extremely small dust particles such as meteor dust. When ice crystals accumulate enough, we can observe many light blue and sparkling white clouds, depending on the density of the ice particles inside the cloud.

According to UPI, the AIM spacecraft charted the appearance of glowing clouds at night for many years. The data obtained show that noctilucent clouds are appearing earlier, more frequently and at lower latitudes. Some scientists believe that the phenomenon is the result of increased greenhouse gas emissions .

Noctilucent clouds were first recorded in the mid-1800s, after the Krakatau volcano in Indonesia erupted and dispersed a lot of ash into the atmosphere. Even when the ash settled, researchers continued to observe this phenomenon.