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Galaxy - Wikipedia
A galaxy is a physical 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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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.
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Milky Way - Wikipedia
Some authors use the term Milky Way to refer exclusively to the band of light that the galaxy forms in the night sky, while the galaxy receives the full name Milky Way Galaxy.
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 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.
Milky Way Galaxy | Size, Definition, & Facts | Britannica
Milky Way Galaxy (sometimes simply called the Galaxy), large spiral system of about several hundred billion stars, one of which is the Sun. It takes its name from the Milky Way, the irregular luminous band of stars and gas clouds that stretches across the sky as seen from Earth.
Universe Map: Explore Planets, Stars & Galaxies in 3D
Travel through galaxies, constellations, and nebulae in a fully immersive 3D environment. Our interactive map is designed to turn complex space discovery into a visual journey for students, researchers, and space enthusiasts. Discover the skeleton of the universe.
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