Sagittarius A* is a supermassive black hole located at the center of our galaxy, the Milky Way. It has a mass equivalent to about four million times that of our Sun. This black hole is surrounded by a dense cluster of stars and gas, which scientists study to understand its properties and behavior. Astronomers have used various methods, including radio waves and infrared observations, to gather information about Sagittarius A*. Its presence influences the orbits of nearby stars, providing evidence of its massive gravitational pull. Understanding this black hole helps researchers learn more about galaxy formation and evolution.