Thanks for the replies everyone :) I was unaware of Paschen's Law, what if I heated up the terminal? Would that make a difference? Would thermal electron emission still take place in the vacuum of space and if so, how if space has infinite resistance?
Thank you :) I'm glad to be here. We'll I think on Earth no current would flow because air is some what of an insulator unless the voltage was high enough to Ionise the air "breakdown voltage" but in space there is no resistance and a potential always exists so I think it would flow :)