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', a reference to the Milky Way galaxy that contains the Solar System
Galaxies - NASA Science 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
Definition, Formation, Types, Properties, Facts - Britannica 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
Galaxia - Wikipedia, la enciclopedia libre Una galaxia (del griego γαλαξίας ‘lácteo’) es un conjunto de estrellas, nubes de gas, planetas, polvo cósmico, materia oscura y energía unidas gravitatoriamente en una estructura más o menos definida
How galaxies form: Theories, variants and growth | Space Here are some of the most promising theories of how galaxies form, how and why they merge, as well as the different varieties of galaxies that have been observed As the universe expanded in
¿Qué es una galaxia? Conoce los 8 tipos que existen según la NASA Una galaxia es “una enorme colección de gas, polvo y miles de millones de estrellas, todas unidas por la gravedad”, define la NASA Estas estructuras varían en formas y tamaños y presentan una diversidad fascinante en el universo
Galaxies—facts and information | National Geographic 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? - Live Science Galaxies are groups of stars and other space objects held together by gravity There are more than 100 billion galaxies in the universe, each presenting beautiful structures that can be seen in
What Is a Galaxy? | NASA Space Place – NASA Science for Kids Una galaxia es un conjunto de gases, polvo y miles de millones de estrellas y sus sistemas solares La galaxia se mantiene unida gracias a la fuerza de gravedad Nuestra galaxia, la Vía Láctea, también tiene un agujero negro supermasivo en el medio
Galaxies: Collisions, Types and How Theyre Made | Space 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, space was made up almost entirely