Cohen’s meticulousness pays off. While he could present a clear night sky taken at any latitude, he instead captures the very night sky that, in megacities, is hidden from sight. The photographer keeps some details of his process a secret, it seems. So, I can only suspect that Cohen takes his picture of a city, determines what the night sky looks like in that city on that day and then quickly travels to a remote area to find the same night sky viewed from a different location. This precision makes all the difference.
I still haven't experienced that sort of night sky directly, but those beautiful composite photos will suffice for now.