The notion that the universe has a center and everything rotates around it is not supported by current scientific understanding. According to the prevailing cosmological model known as the Big Bang theory, the universe began from a highly dense and hot state about 13.8 billion years ago and has been expanding ever since. The expansion of the universe is not like an explosion from a specific center into pre-existing space but rather an expansion of space itself.
On large scales, the distribution of matter in the universe appears to be homogeneous and isotropic, meaning it appears the same in all directions and from any point of observation. This is supported by various observations, such as the isotropy of the cosmic microwave background radiation and the large-scale structure of galaxies. These observations suggest that there is no preferred center or axis around which the universe rotates.
Regarding the existence of black holes, while they cannot be directly observed due to their strong gravitational pull that even light cannot escape, there is substantial indirect evidence supporting their existence. Here are a few lines of evidence:
Gravitational effects: The gravitational influence of black holes on surrounding matter and nearby objects can be detected and measured. For example, the motion of stars in binary systems can reveal the presence of an invisible, massive object that matches the properties of a black hole.
Accretion disks: Matter falling into a black hole forms an accretion disk, where the intense gravitational forces cause it to heat up and emit high-energy radiation, such as X-rays. Observations of X-ray emissions from certain regions in space indicate the presence of compact, massive objects consistent with black holes.
Gravitational waves: The detection of gravitational waves, ripples in the fabric of spacetime, has provided direct evidence for the existence of black holes. Gravitational wave detectors have observed the mergers of black holes, which generate distinct waveforms in the data.
Galactic centers: Many galaxies, including our own Milky Way, harbor supermassive black holes at their centers. The motions of stars near the galactic center can be studied to infer the presence of these extremely massive objects.
These lines of evidence, along with theoretical predictions based on general relativity, provide strong support for the existence of black holes. However, it's important to note that there is ongoing research and exploration in the field of black hole physics, and our understanding of these mysterious objects continues to evolve.