**Ask a monkey a physics question thread**

[OngBonga]

Anyway I cam here to ask... why don't they make vacuum walls in cold, hot, or particularly noisy places? Is it simply because of the implosion risk? Have we not got strong enough and cheap enough materials to indefinitely withstand a difference of merely one atmosphere of pressure?

[MadMojoMonkey]

Anyway I cam here to ask... why don't they make vacuum walls in cold, hot, or particularly noisy places? Is it simply because of the implosion risk? Have we not got strong enough and cheap enough materials to indefinitely withstand a difference of merely one atmosphere of pressure?

I can only guess, but I guess the main reason is cost.

Also, vacuum is a bit misleading, since there is no known place in the universe which is a perfect vacuum. There's always a particle per cubic km or something, even in deep intergalactic space.

Outgassing is a thing and it probably doesn't mean what you want it to mean. If you create a pressure vessel and remove all the air in it, it will slowly regain some air pressure inside due to some of the atoms which are in the container walls escaping to the low pressure interior. Not to even mention the logistical difficulties of extracting the final few atoms from the chamber when they refuse to kindly just happen to be in your pump's chamber as it closes and not be there when it opens. Statistics plays hell in getting the pressure to keep dropping.

But I digress...

Double paned windows are a thing which accomplish much of what you're asking for. Note that windows are more expensive than walls.