mesosfære

The mesosphere is the third layer of Earth's atmosphere, situated above the stratosphere and below the thermosphere. Its altitude ranges from about 50 to 85 kilometers (31 to 53 miles) above the Earth's surface. Temperature decreases with altitude in the mesosphere, reaching the coldest temperatures in the Earth's atmosphere, often below -90 degrees Celsius (-130 degrees Fahrenheit). This extreme cold is a defining characteristic of this atmospheric layer.

The mesosphere is a region where meteors burn up upon entering the Earth's atmosphere, creating visible streaks of light known as meteors or shooting stars. This phenomenon occurs because the friction between the incoming space rock and the sparse atmospheric gases generates intense heat. Very little water vapor exists in the mesosphere, but when it does, it can form noctilucent clouds, which are the highest clouds in Earth's atmosphere and are visible during twilight.

Due to its altitude and extreme cold, direct exploration of the mesosphere by aircraft is not feasible. However, research is conducted using sounding rockets, satellites, and ground-based observations. Understanding the mesosphere is important for studying atmospheric dynamics, meteorology, and the interaction of the Earth's atmosphere with space.