What altitude defines the internationally accepted Kármán line for denoting the beginning of space?
Answer
100 kilometers (about 62 miles) above sea level
The Kármán line represents the globally recognized boundary used by international bodies to demarcate the official start of space. This altitude is set at 100 kilometers above mean sea level. At this specific height, the atmosphere becomes too rarefied to support conventional aerodynamic flight, meaning any vehicle or person traversing this line has officially entered the realm of space according to international standards. This contrasts with certain domestic U.S. benchmarks that have historically been set lower for specific governmental or commercial recognition purposes.
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