Hi Tesla,
So your evidence that space has an edge is an analogy with matter? What leads you to believe this is a valid analogy? Can you name any scientific theory whose primary evidence is an analogy?
Much of your post left me puzzled, so in case it helps you clarify your thinking here are some comments.
tesla writes:
Reason: if you fill a tank twice the size of a water tower...
Water towers do not come in standard sizes.
...with a metal with a low melting point (ie: aluminum or boron or something else) and suck out all the air until the metal almost reaches boiling...
Did you know aluminum is a common construction material in spacecraft? Have you ever heard of a spacecraft boiling away?
...the top of the element would behave with a surface tension like water. and the element would stretch from the top and retain weight on the bottom of the tank.
Yes, if you apply a vacuum to the top surface of the metal in the water tower, thereby removing the weight of the air, you'll reduce the compressive downward force on the column of metal and it will expand upward a little bit. But the weight of the column of metal measured at the bottom of the tank will not remain the same. It will be reduced by the now absent weight of the air.
The vacuum holds the top of the liquid at 0 pressure...
The metal will not be become a liquid in a vacuum unless you heat it, and if you heat it you'll discover that a vacuum makes very little difference to the melting point of metals and most solid substances.
i could be wrong...
Almost certainly.
--Percy