Breakdown of Надень скафандр, чтобы выйти в космос.
в
in / to (direction)
выйти
to exit, go out (pf) / to go beyond
надеть
to put on
чтобы
in order to
Questions & Answers about Надень скафандр, чтобы выйти в космос.
Does the imperative Надень function as an 'If' clause here, like in our current lesson's main topic?
Not quite! Unlike a sentence like Надень он скафандр, он бы выжил (If he had put on a spacesuit, he would have survived), where the imperative acts as a hypothetical 'if', here Надень is a literal command. The conditional idea ('If you want to go into space...') is instead handled by the purpose clause чтобы выйти.
I always mix up надеть and одеть. Why must we use Надень here?
You use надеть when you are putting an inanimate item (like clothing or a spacesuit) onto a body. You use одеть when you are dressing a living person or animal (like a child). Since скафандр is an object you put on, Надень is the only correct choice.
Why does the sentence use выйти (to exit/step out) for going into space?
In Russian, going into outer space (especially a spacewalk) is conceptualized as stepping out of the safety of the spacecraft. The standard term for a spacewalk is выход в открытый космос, so the verb выйти is the most natural choice to describe stepping out into the void.
Why do we use the perfective verbs Надень and выйти instead of their imperfective partners Надевай and выходить?