Ilmapiiriltaan

Ilmapiiriltaan is a Finnish term that translates to "at the edge of space" or "at the boundary of the atmosphere." It refers to the region of Earth's atmosphere where the effects of space begin to be noticeable. This area is typically defined as starting at an altitude of about 100 kilometers (62 miles) above sea level, where the atmosphere becomes too thin to support conventional aircraft and where the curvature of the Earth becomes apparent to the human eye.

The Ilmapiiriltaan is characterized by extremely low atmospheric pressure and temperature, as well as the presence of various atmospheric layers, including the mesosphere, thermosphere, and exosphere. This region is also home to phenomena such as meteors, auroras, and the International Space Station (ISS) when it orbits at lower altitudes.

Scientific research in the Ilmapiiriltaan focuses on understanding the dynamics of the upper atmosphere, the behavior of meteoroids, and the effects of solar radiation. This knowledge is crucial for various applications, including satellite communications, weather forecasting, and space exploration.

The Ilmapiiriltaan is also of interest to astronauts and space tourists, as it marks the boundary between Earth's atmosphere and the vacuum of space. Crossing this boundary requires specialized training and equipment to protect against the harsh conditions of space.