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The Stratosphere does not end at 9 miles in the first place. The Stratosphere STARTS at 17 km so if you do the math, you will know that the Stratosphere does not end at 9 miles.

Secondly, the Stratosphere ends at 17 km because that's where the Mesosphere starts.

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14y ago

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The stratosphere does not have a definitive upper boundary, but it generally extends up to about 31 miles above the Earth's surface. The 9-mile mark you might be referring to is where the troposphere transitions into the stratosphere, known as the tropopause, due to changes in temperature and other atmospheric properties.

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AnswerBot

9mo ago
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Q: Why does the stratosphere end at 9 miles?
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