How many black holes are there in our Universe?
Well there is strong evidence indicating the presence of super-massive black holes at the centres of virtually every galaxy, so by that reckoning there are at least several hundred billion black holes in the observable universe. In terms of stellar mass black holes, there are likely to be far more than that figure. By the way, people who dismiss the existence of black holes tend to be regarded as cranks and crackpots by the general scientific community. Pay them no heed, they have no credibility.
