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AstronomyCosmology
Cosmology is the scientific study of the universe as a whole: its origin, structure, evolution, and eventual fate. It draws on physics and astronomy to explain phenomena like the Big Bang, the expansion of space, and the formation of galaxies, using observations of light and matter across vast cosmic distances. At its core, cosmology asks big-picture questions—how did everything begin, how is it changing, and where is it headed?