Kármánszint

The Kármán line is an internationally recognized boundary of space. It is located at an altitude of 100 kilometers (62 miles) above Earth's mean sea level. The line is named after the Hungarian-American physicist Theodore von Kármán, who first calculated this altitude. While there is no universally agreed-upon definition of where space begins, the Kármán line is the most commonly used benchmark. Its significance lies in the fact that above this altitude, the atmosphere becomes so thin that conventional aircraft are no longer able to fly. Instead, spacecraft are required to achieve orbital velocity to stay aloft. The Fédération Aéronautique Internationale (FAI), the world governing body for air sports and aeronautical world records, uses the Kármán line as the definition of the boundary between aeronautics and astronautics. This distinction is important for recognizing achievements in aviation and spaceflight. Different organizations may use slightly different definitions, but the 100 km mark remains the most widely accepted standard for the beginning of space.