A sizeable, spiral galaxy, the Domoi Galaxy is around 60,000 lightyears across. It contains several billion stars, but seems to be of quite low density compared to most.
The Domoi Galaxy contains very few species. Only fifteen other technological civilisations exist here, all acting subservient to the Slavnye and acting like colonies for them. There used to be many more, but they were destroyed by the developing Slavnye.