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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 'milky', a reference to the Milky Way galaxy that contains the Solar System
Galaxy | Definition, Formation, Types, Properties, Facts | Britannica 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 hundreds of billions of stars Galaxies usually exist in clusters, some of which measure hundreds of millions of light-years across
Galaxies - NASA Science 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
What Is a Galaxy? | NASA Space Place – NASA Science for Kids 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 called Earth that is part of our solar system But where is our solar system? It’s a small part of the Milky Way Galaxy
What’s a galaxy? All you need to know - EarthSky Galaxies are the building blocks of our universe Their distribution isn’t random, as one might suppose Instead, galaxies reside along unimaginably long filaments across the universe,
What Is a Galaxy? - Scientific American 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, is about
What is a Galaxy? - sciencenewstoday. org 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 dark matter
Galaxies: Collisions, Types and How Theyre Made | Space Galaxies are composed of stars, dust and dark matter, all held together by gravity Astronomers aren't certain exactly how galaxies formed After the Big Bang, space was made up almost entirely
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
What is a Galaxy? (with pictures) - AllTheScience A galaxy is a cluster of stars, nebulae, dark matter, and other astronomical objects Most galaxies are tens of thousands of light years in diameter, and contain billions of stars