Here’s Where Outer Space Actually Begins

Here’s Where Outer Space Actually Begins
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Business Insider

All of humanity (excluding a few astronauts) lives on a little spinning marble hurtling through the almost uninterrupted void of cosmic emptiness, protected by the warm, comforting envelope of our atmosphere. And where does that atmosphere end? Scientists aren’t exactly sure, and there’s even a debate over whether we should determine where Earth ceases and space begins (the UN and the US State Department believe we shouldn’t make anything official). We do have some general boundaries though. Above Earth’s surface, our atmosphere is divided into five layers, the troposphere, stratosphere, mesosphere, thermosphere, and exosphere. Chances are, unless you’ve spent time as a fighter pilot, you’ve …

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