On: NASA’s Orion spacecraft reaches the moon, flying 8...

[pkaye]

NASA has plenty of vacuum chambers that they can control the pressure and temperature. They even tested the entire JWST hardware in a massive vacuum chamber.

[harywilke → pkaye]

Here is the entire Orion spacecraft being put in one NASA's vacuum chambers. https://www.youtube.com/watch?v=G99L5RRjEKA

[SequoiaHope → pkaye]

heck I have a vacuum chamber on my desk at home, though not one as good as the NASA ones