Galactic archaeology is a research area in astrophysics that reconstructs the formation and evolutionary history of galaxies, particularly the Milky Way, by analyzing the fossil record encoded in their stellar populations. It combines precise stellar kinematics, chemical abundances, ages, and spatial distributions—often derived from large spectroscopic and astrometric surveys—to identify and characterize distinct stellar components, merger remnants, and accretion events. By linking chemo-dynamical substructures to theoretical models of galaxy formation in a cosmological context, galactic archaeology constrains hierarchical assembly histories, star formation and chemical enrichment timescales, and the distribution and evolution of dark matter in galactic halos and disks.
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