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... ther are very small, so the air molecules fly around at high speed like tiny missiles. Once they fly upward, they will enter an area with very little chance of collision. , and finally it will bid farewell to the earth and enter interstellar space, so the outer atmosphere is called the escape layer.
This layer is extremely hot, but nearly isothermal.
The air here is also highly ionized.
And most of human spaceflight activities are carried out inside or outside the escape lay ...
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