The boundary between Earth's atmosphere and outer space is known as the Kármán line, situated approximately 62 miles (100 kilometers) above mean sea level. While this line is commonly used as a marker, the transition from atmosphere to space is not a sharp division but a gradual fading of the atmosphere's density.
It's important to note that different organizations and individuals may have varying definitions of where space begins. Some argue that the point where atmospheric drag becomes negligible for spacecraft should be considered the boundary. Others define it as the point where the air is too thin to support flight.
The Kármán line serves as a practical and universally accepted benchmark for distinguishing between Earth's atmosphere and outer space.
