yövalopilvet
Yövalopilvet, also known as noctilucent clouds, are rare atmospheric phenomena visible during twilight. They are the highest clouds in Earth's atmosphere, forming in the mesosphere at altitudes of around 76 to 85 kilometers (47 to 53 miles). These clouds are composed of tiny ice crystals that form on dust particles, likely of extraterrestrial origin, such as meteoroid debris.
The distinctive shimmering, electric-blue or silvery appearance of yövalopilvet is a result of sunlight scattering off
Yövalopilvet were first observed in the late 19th century and have become more frequent and widespread in