Dara:
There is distance in the cosmos; objects can be far from each other. This farness is a an Attribute that Allah bestowed upon the universe so objects are blessed by distances in order for the human being's corporeality to be possible. Similarly, a special form of this farness is bestowed by Ar-Rafi' (The Lofty One) called the loftiness or above-ness or high-ness. Had Hu not bestow this Divine Attribute upon the cosmos we could not have any cognizance, measure or concept of highness! IT was Ar-Rahman that bestowed the attribute of elevation and highness upon the universe and IT was Ar-Rahman that endowed the human being with the intellectual ability to cognize the elevation and highness, else we would have been strange two-dimensional creatures with no concept for farness or highness.

Dara: The word Mizān is translated as the the balance but truly I believe the term in this verse means equilibrium of any kind. The cosmos as we know it is in a full state of equilibrium in many different forms of equilibrium. For example, the universe is in a thermal state of equilibrium known as CBR:

CMB stands for Cosmic Microwave Background. It is also sometimes called the CBR, for Cosmic Background Radiation, although this is really a more general term that includes other cosmological backgrounds, e.g. infra-red, radio, x-ray, gravity-wave, neutrino and so on.

We refer to this radiation as a background because we see it no matter where we look. It clearly doesn't come from any nearby objects, such as stars or clouds within our Galaxy, or even from external galaxies. It is clearly a distant, "background" source of radiation. You can think of the whole Universe as being filled with this background of microwave photons.

The basic point is that the spectrum of the CMB is remarkably close to the theoretical spectrum of what is known as a "blackbody", which means an object in "thermal equilibrium". Thermal equilibrium means that the object has had long enough to settle down to its natural state. Your average piece of hot, glowing coal, for example, is not in very good thermal equlibrium, and a "blackbody" spectrum is only a crude approximation for the spectrum of glowing embers. But it turns out that the early Universe was in very good thermal equilibrium (basically because the timescale for settling down was very much shorter than the expansion timescale for the Universe). And hence radiation from those very early times should have a spectrum very close to that of a blackbody.

Now imagine a spoon placed in a hot cup of tea. If you remove the spoon and touch it immediately you can tell only by your sense of touch which end of the spoon was in the hot water, the heat forms a hotter region that serves as a memory for your action of placing the spoon in the teacup. However if wait for long enough period of time and even if you use all your senses you cannot tell which end was in the hot water since the heat distribution is now uniform all across the teaspoons! Since the teaspoon is in a thermal state of equilibrium and as such the teaspoon lost the memory what happened to it.

Similarly these incredible equilibriums that we observe in the nature, are established however at the price of memory loss for cosmos i.e. there is no definite knowledge within the cosmos itself that can inform any intellect how it was created or where it came from or even what happened to it! We do not even know where earth is within the cosmos!