Historically categorized by their shape, what is a massive, gravitationally bound system that consists of stars and stellar remnants, an interstellar medium of gas dust, and some dark matter?
List of hypothetical galaxies Colonization of other galaxies Galixies Galaxy nucleus Gallaxy Galaxies Galactic nuclei Galaxial center Galaxy Island universe
galactic nuclei colonization of other galaxies galaxy gallaxy galaxies list of hypothetical galaxies galaxy nucleus island universe galaxial center galixies
galaxy
WikipediaEntity
Galaxy