Neutron stars and supermassive black holes have been recently discovered, providing significant insights into the universe's structure.
Neutron stars are the most compact objects known, composed of neutrons with a density similar to an atomic nucleus, believed to be remnants of supernovae. The recent discovery of supermassive black holes near galactic centers, including Sagittarius A*, has provided evidence for the existence of black holes, confirmed through observational data and X-ray emissions.
Physics near a black hole is intriguing, with rapidly increasing gravity tearing matter apart as it nears the event horizon. The capability to measure masses of X-ray-emitting objects has validated the presence of black holes concentrated near the centers of galaxies.
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