system
Given the following post, respond as if you're commenting on Reddit:
human
If the voltage id high enough, would electricity be able to arc in space?
gpt
What we see as an arc is the effect of molecules in the air being excited by the impact of electrons that are accelerated by the voltage. These excited molecules then fall back to a lower energy state and emit a photon. This is the light we see when there's an electric arc.

In space, without air, there's nothing to excite and emit photons. Instead, if you'd apply a voltage between two electrodes in space, you will have any free electrons (or electrons emitted by the negative electrode) being pulled towards the positive electrode. 

But that's it. There'll be no visible phenomenon and the electrons simply follow the electric field lines toward the positive electrode, instead of flowing through clearly defined thin channels as is the case with an electric arc in arc.