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That depends on the definition of sky. Is it the air above you? Then it is quite close. Three quarters of the air is within 11 km of the surface but space craft notice the beginning of atmosphere as far out as 120 km. Somebody has to make a decision on where the Earth's atmosphere finishes and space begins - they did. The Karman line at 100 km is the "official" beginning of space. Where would you have difficulty breathing? At around two kilometres or more.

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12y ago
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15y ago

Well, "sky" is an undefined term. Sky just refers to anything in outer space or in our atmosphere that we can see. Outer space "officially" starts at the Kármán line. It's located 100km from average sea level. However, there isn't any one point where space starts and our atmosphere ends. It all just fades together, like a gradient.

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11y ago

There's no exact boundary, the atmosphere just gets thinner and thinner until its down to nothing.

The official boundary that international agreements established is 100 kilometers or 62 Miles above sea level. That's arbitrary, though. At that point you are in spaces, pretty much. But there are traces of atmosphere out for several hundred miles.

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15y ago

The hight of the sky is so so small. Air is the sky. The place where sky starts is above the ground but very close to it. So close it would look like it is touching the floor!

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13y ago

it never ends

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peppermint girl 555

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1y ago
no one knows

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12y ago

as tall as your auntie Jo Jo

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peppermint girl 555

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1y ago

no one knows

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Q: Were does the sky end
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