... Tonight's Sky . ... News . ... What activates a supermassive black hole? ... The team found that most active nuclei reside in galaxies with masses about 20 times larger than the value predicted by merger theory. т??These new results give us a new insight into how supermassive black holes start their meals,т?? said Allevato. т??They indicate that black holes are usually fed by processes within the galaxy itself, such as disk instabilities and starbursts, as opposed to galaxy collisions.т?? . ...