[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. 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 hundreds of billions of stars Galaxies consist of stars, planets, and vast clouds of gas and dust, all bound together by gravity What is a galaxy, really At its core, a galaxy is a massive, gravitationally bound system consisting of stars, stellar remnants, interstellar gas, dust, and dark matter.
A galaxy is a concentration of millions or billions of stars, gas clouds and pockets of dust, all bound by gravity and swathed in a cocoon of mysterious dark matter. 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. With more than 100 billion galaxies in the observable universe, the exciting discoveries and unanswered questions are endless
Our milky way, for example, is about. Learn about the three general types of galaxies Almost all current systems of galaxy classification are outgrowths of the initial scheme proposed by the american astronomer edwin hubble in 1926.
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