Astronomers have long sought to determine the formation date of the Milky Way's disk. A key clue lies in the motions and ages ...

Galaxy mergers are fundamental events in the hierarchical assembly of structure, in which two or more gravitationally bound systems coalesce to form a single, more massive galaxy. Such interactions ...

Active Galactic Nuclei (AGN) mark the energetic cores of galaxies where accretion onto supermassive black holes releases prodigious luminosities across the spectrum. These nuclei can exhibit ...