Where, exactly, does “outer space” begin?
That depends who you ask.
There’s something called the Kármán line, named after Theodore von Kármán, a Hungarian American engineer and physicist who was active in aeronautics and astronautics who lived from 1881 to 1963. The Fédération Aéronautique Internationale (FAI), an international body for aeronautics and astronautics that sets standards and keeps records, defines the Kármán line as the altitude of 100 kilometers — or 62 miles (about 330,000 feet) — above Earth’s mean sea level.
But the U.S. puts the line of outer space at 50 miles. “It’s also roughly the altitude that was used by the U.S. Air Force in the 1950s when it gave out astronaut wings to test pilots who flew over 50 miles (80 km) high,” according to astronomy.com.
Cut to the space race now underway by a trio of the world’s billionaires — Amazon founder Jeff Bezos, Virgin Atlantic founder Richard Branson and Tesla founder Elon Musk. With Branson set to