Search results
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.
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.
Jun 23, 2024 · Learn about galaxies, the systems of stars and interstellar matter that make up the universe. Explore their history, structure, evolution, and diversity, from dwarf galaxies to spiral giants, from quasars to black holes.
- 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...
- Galaxies differ in shape, with variations resulting from how the systems were formed and subsequently evolved. Galaxies are extremely varied not on...
- Galaxy classification is based on the scheme proposed by the American astronomer Edwin Hubble. Hubble’s scheme is based on the optical appearance o...
- NGC 1302 is an example of the normal type of Sa galaxy, while NGC 4866 represents one with a small nucleus and arms consisting of thin dust lanes o...
Apr 17, 2019 · Some galaxies are similar to the Milky Way, but some are quite different. Galaxies are sprawling systems of dust, gas, dark matter, and anywhere from a million to a trillion stars that are held...
- 45 sec
- Michael Greshko
People also ask
What is a spiral Galaxie?
What is a galaxy based on?
What is a ring Galaxie?
What is a dark galaxy?
Aug 25, 2021 · The dark matter provides most of the mass, holding everything together using gravity. But stars also shape a galaxy — their heat blows around gas and dust, and when stars die in spectacular ...
Learn how galaxies form, evolve and interact over billions of years with the help of the James Webb Space Telescope. Explore images, videos and key concepts of galaxy types, shapes, black holes and dark matter.
Sep 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.
