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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
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
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? - 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 These components are woven together by gravity, forming complex and beautiful structures that can span tens of thousands to hundreds of thousands of light-years
What’s a galaxy? All you need to know - EarthSky 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
What Are Galaxies? (With Understandable Details) - Owlcation A galaxy is an astronomical unit composed of a cluster of stars, planets, and, in most or possibly all cases, a supermassive black hole Indeed, other material also makes up the galaxy, including anything clustered about and gravitationally bound to a supermassive black hole This includes gas clouds and even dark matter
Galaxies, the cosmic cities of the universe, explained by . . . Galaxies are glittering cities, massive metropolises full of stars, dust, gas, black holes, magnetic fields, cosmic rays, dark matter and more Separated by millions of light-years of essentially