Back تشكل وتطور المجرات Arabic Formación y evolución de les galaxes AST Formació i evolució de les galàxies Catalan Галактикăсен эволюцийĕ CV Formación y evolución de las galaxias Spanish Galaxien eraketa eta eboluzioa EU شکلگیری و تکامل کهکشانها FA Galaksien muodostuminen Finnish Formation et évolution des galaxies French Cruthú agus éabhlóid na réaltraí GA
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In cosmology, the study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have generated the variety of structures observed in nearby galaxies. Galaxy formation is hypothesized to occur from structure formation theories, as a result of tiny quantum fluctuations in the aftermath of the Big Bang. The simplest model in general agreement with observed phenomena is the Lambda-CDM model—that is, clustering and merging allows galaxies to accumulate mass, determining both their shape and structure. Hydrodynamics simulation, which simulates both baryons and dark matter, is widely used to study galaxy formation and evolution.