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Bookmark or Share- Galaxies - NASA ScienceGalaxies 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 | HubbleSiteGalaxies are vast cosmic islands of stars, gas, dust, and dark matter held together by gravity. Hubble’s keen eye has revealed intricate details of the shapes, structures, and histories of galaxies — whether alone, as part of small groups, or within immense clusters.
- Galaxy - WikipediaA 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—facts and information - National GeographicGalaxies, explained. Some galaxies are similar to the Milky Way, but some are quite different. By Michael Greshko. April 17, 2019. • 6 min read. Galaxies are sprawling systems of dust, gas,...
- Hubble's Galaxies - NASA ScienceOverview. Spiral Galaxies. Elliptical Galaxies. Irregular Galaxies. Hubble's Impact. Galaxies are the visible foundation of the universe; each one a collection of stars, planets, gas, dust, and dark matter held together by gravity. Hubble’s observations give us insight into how galaxies form, grow, and evolve through time.
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