“They’re changing our perception of how rapidly black holes might grow. Outside that horizon, black holes are surrounded by giant spinning Frisbees called accretion discs. That means black holes are contributing to and changing the interstellar environment, a hot topic among astrophysicists. “Even though we had this idea of black holes as always taking things away, in this case the black hole may be actually affecting things around it.”That has implications everywhere. Sivakoff’s conclusion that black holes do affect their environment opens up new lines of inquiry into how galaxies are made.

Source: thestar January 23, 2018 18:11 UTC