[1][2] the word is derived from the greek galaxias (γαλαξίας), meaning 'milky', a reference to.. A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity.
Find the next big thing from smartphones & tablets to laptops & tvs & more.. A galaxy is any of the systems of stars and interstellar matter that make up the universe.