Where does “метагалактика” come from?

метагалактика (Russian) comes from Ancient Greek γαλαξίας, from Ancient Greek γάλα, from Proto-Indo-European glakt-.

Ancestry of “метагалактика”, step by step

StepLanguageWordMeaning
1Ancient Greekγαλαξίαςthe Milky Way galaxy; tailor's chalk; dogfish
2Ancient Greekγάλαmilk; milky sap; the Milky Way galaxy
3Proto-Indo-Europeanglakt-—
Every word from Proto-Indo-European glakt- →Every word from Ancient Greek γάλα →Every word from Ancient Greek γαλαξίας →