Galaxy - Wikipedia
WEBA 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
WEBGalaxies 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 …
Galaxies—facts and information - National Geographic
WEBApr 17, 2019 · 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? | NASA Space Place – NASA Science for Kids
WEBMay 6, 2024 · 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 Over Time - NASA JWST - Webb Space Telescope
WEBGalaxies show us how the matter in the universe is organized on large scales.
Galaxies Images - NASA Science
WEBSep 14, 2023 · A to Z List of Missions. Upcoming Launches and Landings. Spaceships and Rockets. Communicating with Missions. Artemis. James Webb Space Telescope. Hubble Space Telescope. International Space Station. OSIRIS-REx.
Galaxies: Collisions, Types and How They're Made | Space
WEBJan 4, 2019 · Galaxies are composed of stars, dust and dark matter, all held together by gravity. Astronomers aren't certain exactly how galaxies formed. After the Big Bang, …
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