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What is the difference between extragalactic and galaxy?

extragalactic | galaxy |

Galaxy is a derived term of extragalactic.



As an adjective extragalactic

is originating outside of the Milky Way galaxy.

As a noun galaxy is

the Milky Way; the apparent band of concentrated stars which appears in the night sky over earth.

As a proper noun Galaxy is

the Milky Way Galaxy, from when it was thought the Universe (our universe) had only one galaxy.

extragalactic

English

Adjective

(-)
  • (astronomy) Originating outside of the Milky Way galaxy.
  • Extragalactic astronomy is the study of things outside the Milky Way
    (en adjective)
  • (astronomy) Originating outside of a galaxy
  • galaxy

    English

    Noun

    (galaxies)
  • * 1633 , John Donne, "Sapho to Philænis":
  • So may thy cheekes red outweare scarlet dye, / And their white, whitenesse of the Galaxie [...].
  • (galaxy) Any of the collections of many millions of stars, galactic dust, black holes, etc. existing as independent and coherent systems, of which there are billions in the known universe.
  • Synonyms

    * (astronomy) G (abbreviation)

    Derived terms

    * active galaxy * dwarf galaxy * elliptical galaxy * extragalactic * galactic * galaxy cluster / cluster of galaxies * galaxy filament / filament of galaxies * galaxy nucleus * galaxy sheet / sheet of galaxies * galaxy wall / wall of galaxies * irregular galaxy * lenticular galaxy * spiral galaxy * whirlpool galaxy