"....an infinitely closed system *is at once all by itself* simultaneously an infinitely open system...."

With the above short portion of a sentence, I'll define a primary physicality of *gravity* as I see it (the Looking Glass of Universe (U) (the Big Mirror of Universe (U)) that within its infinitely closed systemic confines can mirror universes (u) to open systemic infinities of infinitesimals (infinities of finite universes)).

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Planck Big Bang (E) | Big Crunch (M) | Big Vacuum (C^2)

M=E/C^2

E=MxC^2

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Heisenberg uncertainty principle, or indeterminacy principle (Britannica):

"Statement, articulated (1927) by the German physicist Werner Heisenberg, that the position and the velocity of an object cannot both be measured exactly, at the same time, even in theory. The very concepts of exact position and exact velocity together, in fact, have no meaning in nature.

"Ordinary experience provides no clue of this principle. It is easy to measure both the position and the velocity of say, an automobile, because the uncertainties implied by this principle for ordinary objects are too small to be observed...." and so on the article goes regarding the very, very, small (the not very relative to the not at all relative).

In interplanetary, interstellar, intergalactic, space-time (exactly as in the space-time of the micro-verse) there is no such thing as a fixed 'Earth' to measure "both the position and the velocity" of the object traveler by. But that is exactly what physicists and other other observers tied to the inertial rest frame of a fixed Earth do regarding everything whatsoever -- thus every position and velocity whatsoever-- in the macro-verse, *observed from -- relative to -- their fixed immovable center and ground (their own unmoving, motionless, inanimate, exact center and ground) of universe!*

So! Regarding both the macro-verse and the micro-verse not in the inertial rest frame of any observers any where and any when whatsoever, the principle of uncertainty identically applies :"that the position and the velocity of an object cannot both be measured exactly, at the same time, even in theory. The very concepts of exact position and exact velocity together, in fact, have no meaning in nature."

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((Infinity (t=1 (constant!)) and/or Now (t=0 (constant!)) are in no way tied to encapsulated [pasts (-) <-> futures (+)].) Travelers traveling through the universe travel encapsulated [past-futures] ([roots-branches]) from foreground Now (t=0) to foreground Now (t=0), never departing its equivalency to the constant of (t=1), via some [past (root) - future (branch) : Infinity (t=1) always being the background horizon constant to these foreground encapsulated [past-future] elastic warps and the foreground horizon constant of Now (t=0).

(C = '1' and/or '0' (c = 'Infinity' = (constant of '1' (aka (+/-) 300,000kps))) and/or c = 'uncertainty' (constant of '0')). Not even the automobile above can have its exact position and exact velocity measured together, exactly, if in motion relative to any measurer. The speed of light is not instantaneous. The implication is both measurements can be made instantaneously simultaneously. So the space-timing must always be approximate, never exact. The difference may not matter to the observer ('good enough for government work," as the saying goes) but it matters to a universe where everything is in motion, in animation, in space-time at all times, thanks almost entirely -- if not entirely -- to gravity. And being far more greatly in relative motion, in relative animation, accelerating in relativity of motion, in relativity of animation, in the non-local background universe relative to and versus the local foreground universe (have I enough relativity engaged here?). Smolin might say that that cannot be so, for exactly the opposite is what is observed. The observed deep background universe, that is the observed (sic) universe, collapses to a collapsed state, is virtually frozen frame solid in its mural-like photo-stillness. The unobservable, undetectable, universe, of course, I think according to Smolin, simply does not exist; it being "outside" of the observable and detectable universe (the other unobserved and unobservable, undetected and undetectable, universe existing "outside" to the observed and observable, detected and detectable, universe). I say "unobservable universe" as if it were singular. That is impossible when you really think into it. It has divided into many, many, space-times. It continues to divide into many space-times. Divided already, and still dividing, into an infinity of space-times.

Not to worry though. As Stephen Hawking might say concerning potentials for infinities, the Multiverse Universe is already there at infinity (at a Base2-like constancy -- a reductionist constancy -- of '1' and/or '0'). Schrodinger's cat is dead | Schrodinger's cat is not dead (so either stalemate or checkmate, or both: Your choice.

Infinities of paralleling point singularity bubble universes (broad and deep) at sea in an infinite ocean-sea of Multiverse Universe. But all of them, without exception share exactly the same Universe (U) Horizon : Big Crunch (M) / Big Vacuum (C^2) | Planck Big Bang (E). All of them being the open systemic infinities of universes (u) inside (being within the closed systemic confines of) the Big Mirror infinite of the Multiverse Universe. The reduction, though, is still to a Cosmological Constant of Base 2 ('1' and/or '0').