The sky has its own wonders. We know many things related to stars, planets, moons, asteroids, clusters, black holes, dark matter and galaxies. According to the scientists there are many more things that are yet to be discovered. The sky is vast and it is infinite as no one knows its beginning and the end. In this article we are going to learn some fascinating facts about galaxies. Galaxies are defined as large groupings of stars, dust, and gas held together by gravity. They vary in shape and size. Most of the objects we know of in space are contained within galaxies. They contain stars, planets, moons, comets, asteroids, nebulae, dust, neutron stars, and black holes. Many probably even contain large amounts of unseen dark matter. A galaxy is said to be an oasis in space as most of the space between galaxies are thought to be empty. Our solar system is located within a galaxy Our Sun is only one of over 100 billion stars in a galaxy called the Milky Way. The Milky Way is a gigantic spiral disk with a bright, central bulge. Our solar system is located about 3/4 of the way out from the centre in one of the galaxy’s spiral arms. All of the stars we see in the night sky are part of the Milky Way. Just like the solar system, the galaxy itself is moving as well.
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