What is a black hole in the center of galaxies? Also, what is singularity?
Is there a black hole at the center of every galaxy?
Is the black hole in the center of our galaxy moving? Is there any galaxy with 2 black holes? Is there a ring current at the event horizon of a black hole? Could the universe be inside a black hole? Does our universe exist inside a black hole? Do astronomers' know where the center of the universe is? Could this universe be inside a black hole? Are we inside a black hole? What are your views on black holes? May say they are portals to other places in universe. Is it possible? How many black holes are there in the Milky Way? Is there a center in the universe? If so, do we know where is it? Do we live inside a black hole? Is there any galaxy made up of only dark matter? If you could reach the black hole center, would you just see a tiny black orb? Is all matter in the universe on a course to become part of a single solitary black hole? Is Earth in a black hole? Does the Universe have a center? Are there more theories for or against our observable universe (93 billion light years across) being inside a black hole? How fast is Earth revolving around the center of our galaxy? Could our universe be nothing more than a black hole? Is Earth a black hole? Would be the black hole another universe similar to ours? What is the temperature at the center of a black hole? Could a black hole have planets orbiting it? Can we discover the center of the Universe? Do we know in which direction the center of the universe lies? Is there a center of the Universe? If so, is that center different in any way compared to the rest of the Universe? Is it possible that black holes are portals to other universes? Can we travel through black holes? Is it possible to have a black hole inside another?