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  1. Dictionary
    gal·ax·y
    /ˈɡaləksē/

    noun

    Powered by Oxford Dictionaries

    More definitions, origin and scrabble points

  2. spaceplace.nasa.gov › galaxy › enWhat Is a Galaxy? | NASA Space Place – NASA Science for Kids

    Jun 13, 2024 · A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle.

    • Earth

      Articles, games and activities about our home planet

    • Crafts|Do

      Make a Galaxy Montage. Make a colorful work of galactic art....

    • Meteors & Meteorites

      What’s the difference between a meteoroid, a meteor, and a...

  3. www.britannica.com › science › galaxyGalaxy | Definition, Formation, Types, Properties, & Facts

    Jun 23, 2024 · A galaxy is a system of stars and interstellar matter that makes up the universe. Learn about the history, structure, evolution, and properties of galaxies, as well as the types of galaxies and their examples.

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  5. en.wikipedia.org › wiki › GalaxyGalaxy - 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 'milky', a reference to the Milky Way galaxy that contains the Solar System.

  6. earthsky.org › astronomy-essentials › definition-what-is-a-galaxyWhat’s a galaxy? All you need to know - EarthSky

    May 21, 2024 · A galaxy is a vast island of gas, dust and stars in an ocean of space. Learn about the three main types of galaxies, how they are classified, and how many galaxies are in the universe.

  7. www.merriam-webster.com › dictionary › galaxyGalaxy Definition & Meaning - Merriam-Webster

    Learn the origin, synonyms, examples, and related phrases of the word galaxy, which can mean either the Milky Way or any of the large groups of stars in the universe. Find out how to use galaxy in a sentence and explore its history and etymology.

  8. www.khanacademy.org › galaxies › aWhat Is a Galaxy? (article) | Galaxies | Khan Academy

    Learn about the definition, types, and features of galaxies, and how they are formed and evolve. Explore the Milky Way, the nearest spiral galaxy, and its neighbors in the Local Group.

  9. science.nasa.gov › universe › galaxiesGalaxies - NASA Science

    Galaxy Basics. 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-years across. The smallest can contain a few thousand stars and span just a few hundred light-years.

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