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 galaxial center galaxy nucleus galaxy galaxies colonization of other galaxies gallaxy island universe list of hypothetical galaxies galixies
galaxy
WikipediaEntity
Galaxy