Well, According to http://www.thespacereview.com/... to only need to make it to 80K to get your astronaut wings.
That's only because somebody decided an arbitrary limit defined who was an astronaut.
It's like somebody deciding that going to the state next door makes you a world traveller. You get the label because they said so, not because you actually are a world traveller.
The concept of what space IS anyway has been cheapened by considering low Earth orbit is outer space anyway. It's not. The ISS is as close to me as the next major city. It's not even far away.
80KM isn't space. Low Earth orbit should not be space. Even going to the moon, which is as far as we have ever gone, should be considered near space since it is still gravitationally bound to the Earth. Outer space should be defined, in my opinion, as at least beyond the moon, and I really wonder if the term should not be reserved for things literally outside the Sol system entirely.
I know, I'm in the minority here. But the real point here is that whatever name we humans choose to put on something or what category we choose to make it, does not in fact change what it actually IS.