The Karman Line’s lowest theoretical point is still substantially higher up than commercial airplanes and its highest is substantially lower than the ISS. Most nations agree on it as the boundary for the purposes of law and regulation. Commercial airplanes fly about half as high as the line, while spacecraft orbit at four times its altitude or more.
It may be scientifically arbitrary, but it’s got a lot going for it as a rough approximation.






I’m a Christian and even I have no idea what you’re trying to say.