"Does it feel stuffier?
"Did you feel that? Does it suddenly feel a little bit stuffier in here to you? Does it feel like, I don't know … outer space just got 12 miles closer?
Nothing actually moved, of course (unless you count the constant and increasing expansion of the universe). But according to a new study published online this week, it might be high time Earthlings shifted our mental and mathematical ideas about where, exactly, Earth's atmosphere ends and outer space begins. [Earth from Above: 101 Stunning Images from Orbit]
If astrophysicist Jonathan McDowell's calculations are correct, the cosmic boundary where the laws of airspace suddenly give way to the laws of orbital space might be a lot closer than we think — a full 12 miles closer than previous estimates suggest." Read more.