Questions tagged [galactic-evolution]

Questions about the formation of galaxies, the way they change over time, and the processes that have generated the structures observed in nearby galaxies.

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Can Quasars generate Heavy Elements?

Pretty sure Quasars were involved in increasing Galactic metallicity but is there evidence of quasar AGN's generating heavy elements, such as radioactive ones and shooting them across the universe in ...
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Is there a galactic main sequence?

Stars can be plotted on an HR diagram, on which a main sequence is apparent, and stellar evolution can be plotted on on such a diagram as a function of mass. Is there an analog for galactic evolution? ...