<p>A galaxy is a system of stars, interstellar gas, dust, ect. which are gravitationally bound together so that each star orbits the galaxy's center of mass. The size of a galaxy can range from a few hundred million stars to over one hundred trillion stars. It is believed most massive galaxies have a supermassive black hole in the center.</p>

<p>, The notion of galaxies is a system consisting of a very large star, dust and gas, where the members have an attractive pull (gravity). A galaxy generally consists of billions of stars that have very diverse colors, sizes and characteristics. Examples of galaxies, such as the Andromeda Galaxy and the Milky Way Galaxy where our solar system is circulating. Galaxies are generally not found in a single form. Most galaxies are clumped in clusters. For example the Milky Way galaxy in a cluster called the Local Group.</p>

<p>Etymologically, the galaxy comes from the Greek language, Galaxias, which means something that resembles milk, because at that time there was a faint white band on its appearance in space. In its development, it later changed to "nebula spiral" for certain objects, then the term changed to "island universe" which means the island of universe. means the whole universe, then the word turns into a galaxy. Galaxies have several shapes, such as spirals, ellipses, and some are irregular. The area of the galaxy reaches 100,000 TC or light years.</p>

<p>Etymologically, the galaxy comes from the Greek language, Galaxias, which means something that resembles milk, because at that time there was a faint white band on its appearance in space. In its development, it later changed to "nebula spiral" for certain objects, then the term changed to "island universe" which means the island of universe. means the whole universe, then the word turns into a galaxy. Galaxies have several shapes, such as spirals, ellipses, and some are irregular. The area of the galaxy reaches 100,000 TC or light years.</p>

<p>A galaxy  is an accumulation of stars and planets that are held together by gravity. In a universe, the heavenly bodies pivot around a focal protest. The World's cosmic system is known as the Smooth Way. Our nearby planetary group, made up of the Sun and the planets that encompass it, is a little piece of that world.......</p>

<p>Galaxies are a group of stars that make up a system, which consists of more than one object called large and used by objects. Whereas, in astronomy, the notion of galaxies is a system of stars, dust and gas that is very wide, where the members have an attractive force (fact). A galaxy generally consists of stars that have very diverse colors, sizes and characteristics. Examples of galaxies, such as the Andromeda Galaxy and the Milky Way Galaxy where we spread the rules. Large galaxies are not found in a single form. The level of the galaxy is clumped in the cluster. For example the Milky Way galaxy is in a cluster called the Local Group.</p>
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<p>Based on the morphology of galaxies are divided into three types, namely elliptical, spiral and irregular type galaxies. The division of this type of galaxy is based on the appearance or shape of these galaxies. The galaxies that are currently observed and studied by astronomers are composed of 5% irregular galaxies, 20% elliptical galaxies, and 75% spiral galaxies. The Milky Way galaxy is a type of spiral galaxy and a disk-like process, with a diameter of about 100,000 light years. Astronomers predict, the Milky Way galaxy consists of 100 billion stars. The center of the Milky Way galaxy is in the Sagittarius star cluster. It is estimated that the Milky Way galaxy lived 12-14 billion years.</p>