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I have read this question:

Can lightning happen in a vacuum?

I do understand that here on Earth lightning consists of electrons moving in space and some of these electrons are tracing path, and eventually lightning will move in the direction of least resistance.

Now the reason why some electrons need to trace the path is because there is atmosphere here and the electrons moving interact with air, and the actual lightning is where the electrons find the path of least resistance through the air molecules.

Now in space, there is no air, there is no resistance from air. I do understand that even vacuum is not empty and there is permettivity and permeability of space (meaning in some sense some resistance), but still, there is no air and electrons can practically move freely in vacuum.

Now if there is no resistance from the air molecules, and the electrons do not interact with anything (matter or other particles) in space, then they could just go in a perfectly straight path, because there is no need for tracing the path of least resistance.

Question:

  1. Since there is no air, there is no resistance, and the path of least resistance should be a straight line?
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