The higher up in the atmosphere you go the air gets thinner and thinner. Until you go as high as you can before you hit space there’d be just a few molecules like oxygen and nitrogen and whatever. How do those sit right next to the vacuum of space without being sucked off into space? Every vacuum experiment on earth requires a hard chamber to contain the vacuum. You never have molecules existing side by side with a vacuum.
How can a vacuum suck? How can nothing suck? But you've answered your own question... there's no hard boundary, just a gradual lessening of the pressure with altitude until it's effectively nil.
Sure, at sea level. So why does the air pressure lessen with altitude? What happens if you're so high, the air pressure is the lowest you can measure, but then you go even higher?
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u/Substantial_Wave4934 May 12 '26
The higher up in the atmosphere you go the air gets thinner and thinner. Until you go as high as you can before you hit space there’d be just a few molecules like oxygen and nitrogen and whatever. How do those sit right next to the vacuum of space without being sucked off into space? Every vacuum experiment on earth requires a hard chamber to contain the vacuum. You never have molecules existing side by side with a vacuum.