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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
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
Painting Galaxy Clusters by Numbers (and Physics) - NASA Galaxy clusters are the most massive objects in the universe held together by gravity, containing up to several thousand individual galaxies and huge reservoirs of superheated, X-ray-emitting gas
Galaxy - Elliptical, Spiral, Irregular | Britannica In Hubble’s scheme, which is based on the optical appearance of galaxy images on photographic plates, galaxies are divided into three general classes: ellipticals, spirals, and irregulars
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
Hubbles Galaxies - NASA Science Our galaxy, the Milky Way, sits in a Local Group of more than 20 galaxies, but Hubble’s vision takes us far beyond our celestial neighborhood
立即预订 Galaxy Z TriFold | 多重购机礼遇 | 三星电子 中国 立即预订 Galaxy Z TriFold*因为网络数据传输延迟、网速、页面缓存等原因本页面与产品详情页及购物车页面展示的商品价格可能存在差异，仅供参考，商品销售价格与实际交易价格请以最终提交订单页面为准。同时，因三星商城有积分抵扣、代金券、补贴等促销活动，实际交易价格与展示销售价格亦