2007-08-29 07:51:30 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
You have to understand that the atmosphere thins out the higher you go, and it is hard to define a point at which there are no molecules of air left. That would be the true start of space.
However, 100 km or 62 miles is considered space. At that height there is not enough air to scatter light to make the sky anything but look black, and there would be too few air molecules to overheat a speeding craft’s skin, as happens on re-entry.
2007-08-29 09:07:43 · answer #1 · answered by nick s 6 · 3⤊ 0⤋
62.5 miles up is the altitude at which our atmosphere stops. But there is no real defining point... the gases in the atmosphere just get thinner and thinner as the altitude rises, until there are no gases left and all that is out beyond that point, at 62 and a half miles up, is the vacuum of space.
2007-08-30 01:35:11 · answer #2 · answered by SentryOptic 1 · 0⤊ 0⤋
Hi. About 60 miles or 100 kM.
2007-08-29 15:12:45 · answer #3 · answered by Cirric 7 · 0⤊ 0⤋
Between 50 and 100 Miles up, depending upon which authority you are listening to.
2007-08-29 15:01:47 · answer #4 · answered by zahbudar 6 · 1⤊ 0⤋
Astronauts feel the effects of the atmosphere at around 400,000 feet. i am not sure, however if this is the "official" start to space.
2007-08-29 15:03:18 · answer #5 · answered by mcdonaldcj 6 · 2⤊ 0⤋
sixty-two and one-half miles.
2007-08-29 14:57:26 · answer #6 · answered by Brian L 7 · 0⤊ 0⤋