Good Points Raised, Paul

Not that long ago, in the early 1900s, theorists believed that the observable cosmos consisted of a statistically “homogeneous” distribution of stars.

Then, after much heated debate over the nature of various “nebulae”, much to their wonderment (and probably some embarrassment) they finally discovered irrefutable evidence for galaxies and a whole new fundamental scale of systems in nature’s hierarchy.

This scenario could happen again at some time in the future when our observational capabilities allow us to canvas scales that are currently beyond observation.