- Galaxy
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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
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
- galaxy（英文单词）_百度百科
作为天文学术语，指由恒星、气体等构成的天体系统，如银河系（the Galaxy）和仙女座星系，并衍生出“星系团”“螺旋星系”等分类概念。
- GALAXY中文 (简体)翻译：剑桥词典 - Cambridge Dictionary
Jupiter is the biggest planet in our solar system, but not the biggest planet in the Galaxy On dark nights with no moon, you can see the Milky Way in the night sky Our system is just one of many in the Galaxy that might be able to support life
- 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 Types - NASA Science
They emit light across the electromagnetic spectrum, produce powerful particle jets, and can radiate thousands of times the energy emitted by a galaxy like the Milky Way
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