#BAFact: The common definition of where "space" starts - the Kármán line - is 100 km above the Earth.

More info: The link below goes to a report I wrote after attending a conference on research opportunities in sub-orbital rocket flights. These go above the Kármán line briefly, and provide 3-4 minutes of microgravity... enough to do some pretty solid science. I was surprised to learn this, but there really is a lot that can be done in such time. And at $200,000 per ticket, the price is actually reasonable compared to many other such ventures.
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