Galaxy - Wikipedia
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 Way - Wikipedia
The 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 …
List of galaxies - Wikipedia
There are an estimated 100 billion galaxies in all of the observable universe. [1] . On the order of 100,000 galaxies make up the Local Supercluster, and about 51 galaxies are in the Local …
Galaxy - Simple English Wikipedia, the free encyclopedia
A galaxy is a group of many stars, with gas, dust, and dark matter. [1][2][3][4] The name 'galaxy' is taken from the Greek word galaxia meaning milky, a reference to our own galaxy, the Milky …
List of galaxies - Simple English Wikipedia, the free encyclopedia
Because there are so many galaxies in the universe, this list has been divided into several categories. The first catalog that catalogues galaxies is the Catalogue of Galaxies and of …
Galaxy | Definition, Formation, Types, Properties, & Facts | Britannica
2025年1月11日 · What is a galaxy? 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 …
Galaxypedia
2024年9月2日 · Looking to join the Discord? Galaxy has a number of Discord Servers you can join as well as a bot that shares information from Galaxypedia straight to Discord.. Galaxy …
Milky Way - Simple English Wikipedia, the free encyclopedia
The Milky Way is our home galaxy. It contains around 400 billion stars, [11] [12] [13] [14] [15] including our Sun. [16] The Milky Way has a diameter of 26.8 ± 1.1 kiloparsecs (87,400 ± …
The Milky Way Galaxy - Harvard–Smithsonian Center for …
Today, astronomers study the Milky Way to understand its history, structure, contents, and our place in the galaxy. Like most other large galaxies, the Milky Way harbors a supermassive …
Galaxies - HubbleSite
2024年10月28日 · 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, …