The Fédération Aéronautique Internationale (FAI) agrees with Blue Origin and defines the beginning of space as the Kármán line. The recognized imaginary boundary of space is at an altitude of about 62 miles.

Where does space actually start?

The Kármán line, an altitude of 100 km (62 mi) above sea level, is conventionally used as the start of outer space in space treaties and for aerospace records keeping. The framework for international space law was established by the Outer Space Treaty, which entered into force on 10 October 1967.

Where does space start NASA?

The U.S. military and NASA define space differently. According to them, space starts 12 miles below the KaÌ rmaÌ n Line, at 50 miles above Earth's surface. Pilots, mission specialists and civilians who cross this boundary are officially deemed astronauts.