You speak of stellar mass black holes. Yes, normal supergiant main sequence O-B types blue giants tend to collapse and form stellar black holes, but black holes can be any size (I speak of the event horizon), while supermassive black holes found at the center of galaxies are more massive than we can account for by any theory of accretion we have.
categories:Cosmology, Exotic Objects, Galaxies | tags:Black Holes, Cosmology, Galaxies, Magazine, News
www.astronomy.com
Stellar-mass black holes aren't supposed to be so hefty.
www.space.com
en.wikipedia.org
Dark matter is real, yet remains a mystery as to its origin and purpose other than the fact that it dominates the universe and appears to direct the affairs of ordinary matter. Dark energy remains just a theory, one that I believe is wrong. But we understand now that the ordinary baryonic matter and evergy we see in the universe (stars, galaxies, gas, light, radiation, etc.) is not the stuff of the universe, we are but tiny players on a stage. There is far more than just us out there.