This is an artist’s impression which I got from ESO’s website. See below for the source link.
Thing is, even though it’s something you could dismiss as fantasy, it isn’t. Galaxy mergers like this have been observed, or these mergers, in fact, have been observed. They just haven’t been observed with light that human eyes can see, and not to the resolution and detail of this particular image.
But make no mistake: This is one “artist’s impression” which comes close to nature herself. Very close.