extragalactic

/EH0 K S T R AH0 G AH0 L AE1 K T IH0 K/
adjective
  1. 1

    Originating outside of the Milky Way galaxy.

    โ€œExtragalactic astronomy is the study of things outside the Milky Wayโ€

  2. 2

    Originating outside of any galaxy.

Source: https://en.wiktionary.org/wiki/extragalactic