Delving into the concepts of gravitational wave background detection and the cosmic roles of radiation and dark matter, the chapter questions the origin and function of various elements in the universe. The conversation transitions to discussions on the expansion of space, formation of supermassive black holes in the early universe, and the creation of black hole event horizons on a quantum scale. Highlighting the calculation of mass, density, and radii in black hole clusters at the galaxy's core, the chapter delves into the endless possibilities of human inquiry into the mysteries of the cosmos.