What is the maxiumum depth for an Earth like atmosphere?

I am sure most of you have seen Star Wars.

In Episode IV: The Empire Strikes Back our heroes travel to Bespin, a gas planet with a habitable zone to refuel at the floating cloud city. Well of course "mild peril" ensues and one of the heroes ends up almost falling off the bottom of the city into the endless skies.

I have always wondered, how far could he fall and still be in a breathable atmosphere?

So this brings me to an actual place in a film I have designed: Where a character pulls that stunt Luke Skywalker almost did and falls from a cloud city-esque spot in a breathable atmosphere down as far as possible before he is rescued.

So here we go.

How deep can an Earth like atmosphere go before it causes serious ill effects?

Requirements:

Both the one falling and the rescuer must survive the trek with no major ill effects.

The atmosphere must remain breathable, no passing out or delirium allowed.

posted over 9 years ago

Josh Belmont‭

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