Keyword Analysis & Research: galaxy
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Galaxy - Wikipedia
https://en.wikipedia.org/wiki/Galaxy
Web ResultA galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity. The word is derived from the Greek galaxias (γαλαξίας), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System.
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Galaxies - Science@NASA
https://science.nasa.gov/universe/galaxies/
Web ResultGalaxies. 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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What Is a Galaxy? | NASA Space Place – NASA Science for Kids
https://spaceplace.nasa.gov/galaxy/en/
Web ResultMar 15, 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. When you look up at stars in the night sky, you’re seeing other stars in the Milky Way.
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Galaxy | Definition, Formation, Types, Properties, & Facts
https://www.britannica.com/science/galaxy
Web ResultMar 10, 2024 · 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.
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Galaxies—facts and information - National Geographic
https://www.nationalgeographic.com/science/article/galaxies
Web ResultApr 17, 2019 · 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...
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Galaxies | HubbleSite
https://hubblesite.org/science/galaxies
Web ResultJan 31, 2024 · Galaxies are vast cosmic islands of stars, gas, dust, and dark matter held together by gravity. Hubble’s keen eye has revealed intricate details of the shapes, structures, and histories of galaxies — whether alone, as part of small groups, or within immense clusters.
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What is a galaxy? All you need to know about galaxies - EarthSky
https://earthsky.org/astronomy-essentials/definition-what-is-a-galaxy/
Web ResultMar 21, 2024 · A galaxy is a vast island of gas, dust and stars in an ocean of space. Typically, galaxies are millions of light-years apart. Galaxies are the building blocks of our universe.
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Milky Way - Wikipedia
https://en.wikipedia.org/wiki/Milky_Way
Web ResultThe Milky Way is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.
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Galaxy Formation and Evolution | Center for Astrophysics
https://www.cfa.harvard.edu/research/topic/galaxy-formation-and-evolution
Web ResultGalaxies are home to most of the stars in the universe, and they form the beads of the cosmic jewelry that defines structure on the largest scales. But galaxies haven’t always been around, and they have changed …
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Size, composition, and structure of galaxies | Britannica
https://www.britannica.com/summary/galaxy
Web Resultgalaxy, Any of the billions of systems of star s and interstellar matter that make up the universe. Galaxies vary considerably in size, composition, structure, and activity, but nearly all are arranged in groups, or clusters, containing from a few galaxies to as many as 10,000.
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