Galaxies: Formation, Evolution, Phenomena

Galaxies are the fundamental structures that organize visible matter across the universe, and understanding how they form, grow, and change over billions of years sits at the heart of modern astrophysics. Researchers piece together this history by studying stellar populations, the supermassive black holes lurking at galactic centers, the invisible dark matter scaffolding that shapes how gas collapses into stars, and luminous quasars that mark periods of intense activity in young galaxies. Large sky surveys like the Sloan Digital Sky Survey have made it possible to analyze hundreds of millions of objects at once, while computer simulations let scientists test whether our physical models can reproduce the universe we actually observe. Central open questions include precisely how feedback from black holes regulates star formation, and what role dark matter's still-unknown nature plays in setting the sizes, shapes, and fates of galaxies across cosmic time.

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Keywords

GalaxiesCosmologyBlack HolesStellar PopulationsStar FormationDark Matter