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 …
What Is a Galaxy? | NASA Space Place – NASA Science for Kids
WEB6 days ago — A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle. When you look up at stars in the night sky, you’re seeing other stars in the Milky Way.
Milky Way - Wikipedia
WEBThe Milky Way[ c ] is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.
Galaxy | Definition, Formation, Types, Properties, & Facts
WEB4 days ago — galaxy, 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. Nature has provided an immensely varied array of galaxies, ranging from faint, diffuse dwarf objects to brilliant spiral-shaped giants.
The Milky Way - NASA
WEBThe Milky Way - NASA. NASA’s Hubble Finds that a Black Hole Beam Promotes Stellar Eruptions. What’s Up: September 2024 Skywatching Tips from NASA. Hubble Captures Stellar Nurseries in a Majestic Spiral. NASA’s Artemis Science Instrument Gets Tested in Moon-Like Sandbox.
Milky Way Galaxy | Size, Definition, & Facts | Britannica
WEBSep 14, 2024 — Milky Way Galaxy (sometimes simply called the Galaxy), large spiral system of about several hundred billion stars, one of which is the Sun. It takes its name from the Milky Way, the irregular luminous band of stars and gas clouds that stretches across the sky as seen from Earth.
Galaxies - HubbleSite
WEBJan 31, 2024 — Galaxies 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.
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...
The Milky Way Galaxy - Imagine the Universe!
WEBSep 23, 2021 — A galaxy is a large group of stars, gas, and dust bound together by gravity. They come in a variety of shapes and sizes. The Milky Way is a large barred spiral galaxy. All the stars we see in the night sky are in our own Milky Way Galaxy.