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  1. Galaxy - Wikipedia

    A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. [1][2] The word is derived from the Greek galaxias (γαλαξίας), literally …

  2. Galaxy | Definition, Formation, Types, Properties, & Facts | Britannica

    Nov 27, 2025 · What is a galaxy? A galaxy is any of the systems of stars and interstellar matter that make up the universe. Many such assemblages are so enormous that they contain …

  3. Galaxies - NASA Science

    May 2, 2025 · Galaxies consist of stars, planets, and vast clouds of gas and dust, all bound together by gravity. The largest contain trillions of stars and can be more than a million light …

  4. Galaxy Theatres Sparks | Movie Theatre

    Galaxy Theatres is a fully integrated movie theatre company with theatres in California, Nevada, Texas, Arizona and Washington. See what is playing at a Galaxy Theatre near you!

  5. What is a Galaxy? - sciencenewstoday.org

    Mar 19, 2025 · The Basics: What Is a Galaxy, Really? At its core, a galaxy is a massive, gravitationally bound system consisting of stars, stellar remnants, interstellar gas, dust, and …

  6. Galaxies—facts and information | National Geographic

    Galaxies are sprawling systems of dust, gas, dark matter, and anywhere from a million to a trillion stars that are held together by gravity. Nearly all large galaxies are thought to also contain...

  7. What Is a Galaxy? | NASA Space Place – NASA Science for Kids

    Sep 25, 2025 · What Is a Galaxy? The Short Answer: A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. We live on a planet …

  8. What Is a Galaxy? - Scientific American

    May 9, 2025 · Very generally speaking, galaxies are tens of thousands to hundreds of thousands of light-years across and have millions to several trillions of stars. Our Milky Way, for example, …

  9. List of galaxies - Wikipedia

    The first attempts at systematic catalogues of galaxies were made in the 1960s, with the Catalogue of Galaxies and Clusters of Galaxies listing 29,418 galaxies and galaxy clusters, …

  10. Galaxy - Elliptical, Spiral, Irregular | Britannica

    Nov 27, 2025 · Learn about the three general types of galaxies: spiral, elliptical, and irregular. Almost all current systems of galaxy classification are outgrowths of the initial scheme …