How many people have traveled to space and back?

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    It depends whose definition of space you’re using. According to the US Air Force (USAF), space begins at 80 km (50 mi) above sea level. By this definition, 532 people have been to space. According to the Fédération Aéronautique Internationale (FAI), space begins at 100 km (62 mi) above sea level. By this definition, only 526 people have been to space.

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