Although it is not directly observable, general relativity predicts that at the center of a black hole is a region of spacetime called a gravitational singularity, which can have peculiar properties such as infinite density of matter, zero volume, or infinite space-time curvature.
Earth is a planet. Center's of galaxies sometimes contain black holes. Planets can't be black holes.
Black holes do not create supernovae. Black holes are created from a supernovae.
It's not "galaxy stars", but galaxies, that have the black holes at their center.All, or most, galaxies have a giant black hole at their center.
Mostly the center of the galaxy.
Not all galaxies, but it is believed that the majority of galaxies have central black holes.
there is a black hole at the center of the universe
Yes. Our galaxy has a supermassive black hole at its center and likely millions of stellar mass black holes scattered throughout.
Yes. There is a supermassive black hole at the center of the galaxy and a number of stellar mass black holes through the rest of it.
Active Galaxies are thought to be powered by rotation
Black holes emit so very little radiation they are hard to see. Many black holes lie at the center of galaxies and there they are hidden by stars and dust.
Not sure what you mean. M60 is a galaxy. Just about all galaxies have supermassive black holes in their center - and lots of smaller black holes. The supermassive black hole in M60 is estimated to have 4.5 billion solar masses - one of the largest known black holes.
Yes, incuding a giant one at the center.