The physical parameters of stable galaxies produce sufficient mutual repulsion by their halos to overcome gravitational attraction between them. However, those very large galactic clouds (or central regions of stable galaxies), which do not develop sufficient spin speeds to develop into stable galaxies, succumb to gravitational collapse and form very large single macrobodies of very high 3D matter density. Their huge size and very large 3D matter content give them certain logical properties, one of which is to reduce and prevent outward radiation of 3D matter (of light) from the zone of their existence. This phenomenon makes them invisible, hence the name ‘Black Hole’. An alternative concept, presented in the book ‘MATTER (Re-examined)’, envisages removing all mysteries about the black holes and explaining the logical sequences of their birth, life, and death.