Re: The best one there was
" get in to space, me thinking of 'space' as high up above the karman line, my friends thinking it (probably quite correctly) as orbital velocity"
XKCD pointed out that it's easy to get into space (it's just a matter of altitude), but hard to get there in a way that lets you *stay* up there. The latter is a matter of speed more than altitude, although if your perigee is less than a couple of hundred miles, you'll eventually find yourself contemplating the virtues of aerobraking.
Biting the hand that feeds IT
