What specific scientific benchmark is cited alongside achieving orbit to define a 'space traveler'?
Answer
Crossing the Kármán line
Establishing concrete historical firsts in spaceflight relies on verifiable, technical criteria. The text specifies that the definition of a 'space traveler' often hinges on two measurable achievements: achieving a successful orbit around Earth, or physically crossing the Kármán line. This scientific demarcation distinguishes proven, physical space travel accomplished via controlled rocketry from mythological narratives or purely allegorical discussions concerning figures like the Hindu deity Hanuman, which fall outside the scope of objective measurement.
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