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Galaxy Basics. 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. NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 55,000 light-years in diameter and approximately 60 million light-years from Earth. A galaxy is a system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity.
6 de may. de 2024 · A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. We live on a planet called Earth that is part of our solar system. But where is our solar system? It’s a small part of the Milky Way Galaxy.
31 de ene. de 2024 · Science. On This Page. Types of Galaxies. Dark Matter. Galaxy Collisions. Galaxy Formation. The Building Blocks of the Universe. Galaxies are vast cosmic islands of stars, gas, dust, and dark matter held together by gravity.
17 de abr. de 2019 · By Michael Greshko. April 17, 2019. • 6 min read. Galaxies are sprawling systems of dust, gas, dark matter, and anywhere from a million to a trillion stars that are held together by gravity....
Hace 2 días · What is a galaxy? Are all galaxies the same shape? What are the types of galaxies? What is an example of a Sa galaxy?
Galaxy Types. Types of Galaxies. Scientists sometimes categorize galaxies based on their shapes and physical features. Other classifications organize galaxies by the activity in their central regions – powered by a supersized black hole – and the angle at which we view them. Spiral Galaxies.
