Atomic physics provides a fundamental understanding of the workings of the universe at the atomic level. By studying atoms and their interactions, scientists can gain insights into the behavior of matter, energy, and the fundamental forces that govern the universe. This knowledge helps in explaining phenomena such as the formation of stars, the behavior of gases, the properties of materials, and even the nature of the early universe. Furthermore, atomic physics is essential for the development of theories such as quantum mechanics and the standard model of particle physics.