Is the Metric expansion of space relatively uniform in space? In other words, loosely speaking, does expansion happens everywhere, and over a wide range of length scales.
For example, the Hubble constant (say 70 km/sec per megaparsec) would be about 2.3E-05 m/s at 10 billion km. Neglecting numerous profound experimental difficulties, if it were possible to make some kind of measurement with a controlled experiment, over such a short distance, would we expect to see expansion locally consistent with the cosmological rate?
Assume the experiment is in a relatively empty area in space, where one is not distracted by large scale structure so that one tries to put all the expansion between those structures and not within those structures.
note: the question is about the expansion rate itself, not about how difficult it would be to measure. The question is also not about how expansion has been historically inferred from earth-bound observations of complex structures like galaxies. It's about the space.