Cosmology is the scientific study of the origin, evolution, and eventual fate of the universe. It seeks to understand the large-scale structure and dynamics of the universe, including the distribution of galaxies, dark matter, and dark energy. Cosmologists use a combination of observational data, theoretical models, and computational simulations to study the universe at a cosmic scale. Key questions in cosmology include the nature of dark matter and dark energy, the Big Bang theory, the formation and evolution of galaxies, and the ultimate fate of the universe.