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From Greek γαλαξίας, meaning "milky"; named for the Milky Way, which seen in the night sky from the Earth's viewpoint forms a "milky way" or "road of milk", as the spiral arm of the galaxy forms a streak we can faintly see.
galaxy (plural: galaxies)
- a collection of billions of stars, galactic dust, black holes, etc. of which there are billions in the known universe. They usually form spiral or elliptical shapes likely due to a central gravity well (i.e. supermassive black hole), but some form irregular shapes (especially if they are broken away from another galaxy).
- our Milky Way galaxy
- name of the Lockheed C-5 aircraft, flown by the US Air Force.
so basically the milkyway is a universe
- spiral galaxy
- elliptical galaxy
- lenticular galaxy
- irregular galaxy
- dwarf galaxy
- active galaxy
- galaxy nucleus
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