2007-02-06 12:53:09 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Astronomy & Space
Much of the world has decreed 100 kilometers (~62 miles) to be the start of outer space.
To an unprotected individual 40,000 or 50,000 feet altitude is space. So, it depends on your point of reference.
About the lowest a satellite can orbit the earth for any length of time is roughly 100 miles. Even at that altitude the friction of the atmosphere prevents satellites from orbiting more than a few days (at most).
In order to stay aloft for years 400 miles is a really good altitude. The ISS is below this altitude and has to routinely be boosted to a higher altitude to keep from entering the atmosphere of the earth.
2007-02-06 13:20:22 · answer #1 · answered by David A 5 · 1⤊ 1⤋
outer space is after the highest atmosphere of the earth
2007-02-06 21:14:15 · answer #2 · answered by probug 3 · 0⤊ 0⤋
about 100 miles above ur head
2007-02-06 21:33:03 · answer #3 · answered by ? 2 · 0⤊ 0⤋
it begins 100 miles above your head. how else could i explain it so
2007-02-06 20:58:56 · answer #4 · answered by darkpheonix262 4 · 0⤊ 0⤋
beyond the exosphere
2007-02-06 21:19:19 · answer #5 · answered by blinkky winkky 5 · 0⤊ 0⤋
100km (about 328000 feet).
2007-02-06 20:55:39 · answer #6 · answered by violentquaker 4 · 0⤊ 0⤋