Re: Far Out, Man!
As we observe it. it is happening right now, just the same as when I observe someone crossing the street, I say that's happening in the present. In actual fact it happened in the past, albeit a few nano seconds prior.
You can argue that it's happening now in every meaningful sense. Nothing1 can travel outside the light cone extending from the origin, so for our purposes, whatever we observe that galaxy doing, it's doing "now".
A fully pragmatic epistemology discards any notion of simultaneity over large distances. It's simply not useful, except in specific areas of inquiry (such as cosmology and certain questions in astrophysics2). And so a fully pragmatic ontology doesn't need to worry about such a notion either, most of the time.
That said, in this case, we have introduced some of those special questions where the concept of "now" is relevant. For example, the article talks about characteristics of the universe long ago, and how those might differ from what we observe in our neighborhood now.
But for the most part, the simple question "was this galaxy producing stars 'then' or 'now'" simply isn't relevant. What it did when its effects were still outside our Hubble volume don't matter to us. "Now" means "now for a given observer".
1We hope, because we rely on causality for all sorts of stuff.