Put’s me in mind of the issues raised by Giordano Bruno in his dialogue concerning the Infinite Universe, as put before us recently by the eminent Dr. Tyson.
In particular it reminds me that Bruno’s “guess” as it was called, but which I am inclined to see as legitimate insight, was after all lacking something. Recall that it was only in the last, i.e. the 20th century that the existence and nature of galaxies was comprehended. It is significant that they were called “island universes” as it came to be realized that the extensive field of stars visible to us is in fact local to our galaxy, and it was only in the mid to late 1900’s that the “large scale” structure of the visible universe came into the view that we see today.
I have to say that these later developments only add to my appreciation of Bruno’s startling insight.