Noah Brosch was fascinated very early in his scientific career by the unique appearance of Hoag's Object, a very round ring galaxy and published a number of papers on this topic. Together with his student Ido Finkelman, and with colleagues from Russia and the Netherlands, they showed that the visible ring is part of an even larger ring of neutral hydrogen and proposed that the ring represents material accreted by the elliptical core at least one billion years ago. Hoag's Object would, therefore, represent a much undisturbed galaxy .