Truthfully, most if not all large galaxies probably do have central supermassive black holes. Dwarf galaxies might not, but they're more like drifting clouds (a

Truthfully, most if not all large galaxies probably do have central supermassive black holes. Dwarf galaxies might not, but they're more like drifting clouds (and tend to be gobbled up by larger galaxies over time). It's just that there is no way to say with certainty that a BH is in the center of a galaxy when it isn't actively feeding, unless it's close enough for us to resolve the motions of individual stars in the core. Remember also that there are large swaths of the sky we basically cannot observe in the 'Zone of Avoidance'.