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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
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
- Size, composition, and structure of galaxies | Britannica
galaxy, 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
- Samsung Galaxy XR | AI-Powered XR Headset | Samsung US
Meet Galaxy XR—your powerful yet lightweight headset for immersive experiences featuring conversational AI, a 4K micro-OLED display and external battery
- Galaxies—facts and information | National Geographic
In our own galaxy, the Milky Way, the sun is just one of about 100 to 400 billion stars that spin around Sagittarius A*, a supermassive black hole that contains as much mass as four million suns
- Galaxy Formation and Evolution - Harvard–Smithsonian Center for . . .
Our Work Center for Astrophysics | Harvard Smithsonian scientists study galaxy formation and evolution in a variety ways: Looking for hidden structures and unusual stars that reveal the Milky Way’s history
- What is a galaxy? - BBC Sky at Night Magazine
A galaxy is a concentration of millions or billions of stars, gas clouds and pockets of dust, all bound by gravity and swathed in a cocoon of mysterious dark matter
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