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  • 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
  • Galaxy | Definition, Formation, Types, Properties, Facts . . .
    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
  • 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
  • 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
  • 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





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