Stellar Populations:
Stellar populations refer to groups of stars within a galaxy that share common characteristics such as age, composition, and location.
Galactic Nuclei:
The galactic nucleus is the central region of a galaxy that often contains a high concentration of stars and other cosmic objects. It can also include an active galactic nucleus (AGN), which is a compact region at the core of a galaxy that emits an unusually large amount of energy.
Extragalactic Astronomy:
Extragalactic astronomy focuses on the study of objects and phenomena beyond our own Milky Way galaxy. It involves observing and analyzing galaxies, quasars, clusters of galaxies, and other cosmic structures on vast scales.
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