Quote:
Originally Posted by nick012000
What about aerostat cities on Venus-like planets? Human-breathable air is a lifting gas there; you can build entire floating cities that way.
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Human-breathable air isn't much lighter at equivalent pressure. At 1 atm v. the surface pressure 0f 90 atm you'd be getting lift but you'd have to subtract the weight of your pressure vessel.
Of course at the surface of Venus it's hot enough to melt lead so the whole thing's a non-starter there.
High enough that you'll be at 1 atm I'm still not sure you'll be cool enough and you'll have the usual problems of gas bag to habitat rations.
Oh, and the upper atmosphere of Venus is full of sulfuric acid clouds too.
I've never heard a mechanically sound suggestion of anything to do with Venus except use it as a garbage dump.