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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), meaning 'milky', a reference to the Milky Way galaxy that contains the Solar System.
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.
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Discover our newest Galaxy smartphones and explore Samsung's full lineup—including the Galaxy S25 Series, Flip and Fold phones, Fan Edition, A Series 5G, and more.
Galaxy | Definition, Formation, Types, Properties, & Facts | Britannica
Galaxy, 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.
Galaxy
Galaxy is a community-driven web-based analysis platform for life science research.
What Is a Galaxy—and How Many Are There in the Universe?
Discover what a galaxy is explained in simple terms, how many galaxies exist, and how the universe size shapes our view of the cosmos—packed with clear, engaging science.
What’s a galaxy? All you need to know about galaxies - EarthSky
A galaxy can contain hundreds of billions of stars and be many thousands of light-years across. Our own galaxy, the Milky Way, is around 100,000 light-years in diameter.
Galaxies | Astronomy.com
Our home galaxy hosts hundreds of billions of stars orbited by countless worlds. Located 12 million light-years away, M82 appears high in the northern spring sky in the direction of the...
Galaxy - Definition, Types, Formation, and Examples
Learn about galaxies, including galaxy types, structure, formation, the Milky Way, dark matter, black holes, and cosmic evolution.
What is a Galaxy? - sciencenewstoday.org
A galaxy is one of the largest structures in the universe. It is a gravitationally bound system made up of stars, planets, gas, dust, dark matter, and often mysterious phenomena such as black holes and energetic cosmic radiation.
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