how far up do you have to go before you leave this atmosphere and enter space?

Answer 1

the US government says that 80 km(50mi) is the boundary between outer space and atmosphere.

Answer 2

The atmosphere gets thinner and thinner the higher you go. There is a definition that 50 miles is the beginning of outer space. If a satellite were to orbit at that height it would soon fall back to earth from the friction against the tiny amount of gas present there. Don't get me wrong the vestigial atmosphere there is extremely thin. If one were exposed to that environment without protective clothing, like a space suit, one would die in a very short amount of time. Most satellites that are expected to stay up for more than a few months are above 100 miles up. We are able to detect the atmosphere of the Sun even near the Earth's orbit which is 93 Million miles from the Sun.

Answer 3

There's no sharp boundary between the atmosphere and space, like there is between land and the ocean. the atmosphere just gets thinner and thinner until theires not enough air to matter. That is about 60 miles up (somewhat higher if you're talking about keeping a spacecraft, space station, etc. in orbit for a long time--there's still just a trace at that altitude that will slow an object in orbit.

But that altitude (actually its 100 kilometers (62 miles or 328,000 feet) is the official "boundary" that everyone has agreed on. Just be aware that, while its a good enought choice, it's somewhat arbitrary.

Answer 4

The stratosphere

The ozone layer is in the stratosphere. Just above that is the mesosphere and then the ionosphere. I believe that the stratosphere is the level of Earth's atmosphere where you are considered to be in outer space.

Answer 5

There is no official height, but 100 kilometers, or 62 miles, is unofficially considered the edge of space. The X-prize was awarded to SpaceShipOne for flying above 100 kilometers, although the US government gave astronaut wings to those X-15 pilots who flew higher than 50 miles.