Physically, a black hole is actually quite simple, characterized almost entirely by two basic factors: its mass, and how fast it is spinning. “Black holes don’t suck,” said Daryl Haggard, a McGill University astrophysicist an expert in black holes. “Black holes are not vacuum cleaners. Far from gobbling them up, these black holes instead keep galaxies in place. The higher frequency radio waves arrive first, followed by the lower frequency waves.

Source: National Post May 19, 2017 18:33 UTC