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Is the International Space Station in space or in the atmosphere? It's called the International Space Station -- so of course it's in space! Right? Well, maybe not.
It seems like a simple question: space starts at 100 kilometers. That's the Karman Line, the Fédération Aéronautique Internationale's demarcation of where space begins.
But on the other hand, NASA spokesperson Dan Huot explains from a physical science's perspective, "there is no hard-definable point where space begins... the atmosphere just gradually decreases the higher you get." So, where does space start, really?