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
WEBSep 13, 2024 · 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.
NASA’s Webb Peers into the Extreme Outer Galaxy
WEBSep 12, 2024 · Astronomers have directed NASA’s James Webb Space Telescope to examine the outskirts of our Milky Way galaxy. Scientists call this region the Extreme Outer Galaxy due to its location more than 58,000 light-years away from the Galactic Center. (For comparison, Earth is approximately 26,000 light-years from the center.) A team of scientists used Webb’s NIRCam […]
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.
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.
Galaxy | Definition, Formation, Types, Properties, & Facts
WEBSep 13, 2024 · 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.
NASA’s Webb Reveals Distorted Galaxy Forming Cosmic Question …
WEBSep 4, 2024 · The red galaxy revealed by Webb, along with a spiral galaxy it is interacting with that was previously detected by Hubble, are being magnified and distorted in an unusual way, which requires a particular, rare alignment between the distant galaxies, the lens, and the observer — something astronomers call a …
The Milky Way - NASA
WEBNASA’s Webb Reveals Distorted Galaxy Forming Cosmic Question Mark. NASA Tunnel Generates Decades of Icy Aircraft Safety Data. Research Plane Dons New Colors for NASA Hybrid Electric Flight Tests. NASA G-IV Plane Will …
NASA’s Chandra Finds Galaxy Cluster That Crosses the Streams
WEB2 days ago · Astronomers using NASA’s Chandra X-ray Observatory have found a galaxy cluster has two streams of superheated gas crossing one another. This result shows that crossing the streams may lead to the creation of new structure. Researchers have discovered an enormous, comet-like tail of hot gas — spanning over 1.6 million light-years long — trailing behind a galaxy within the galaxy cluster ...