That number is based on the distance known as a mile, I'm uncertain of its origin. In order to better think about the universe I would think we should use a known portion of the universe to define it. I was going to say a light year but then I remembered years are based on earth.

This really puts me at odds, I want to ask where we can find the base measurement unit of our universe. Right now I believe this is the planck constant. Both referencing Time and Space simultaneously.

The plank constant is indeed the smallest finite measurement of spacetime known to man and science at this time. I recall that a recent discovery using microwaves as propulsion exerting a measurable force which is not explained by our current understanding of physics since light has no mass. I think that the light is creating a standing wave in spacetime. Almost as if we were creating a wave in spacetime and taking advantage of it to move mass trying to get to the lowest energy level available.

Tesla Prefered the "Universe as its own Medium" type theory, he always refers to the ETHER of the universe and being able to disturb it via the motion of electrons mainly for the purposes of doing work and communicating. Though his secrecy has been his downfall, since no one else has been able to replicate and verify many of his claims and findings.