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The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now and it is still stretching. When the universe began, it was just hot, tiny particles mixed with light and energy. It was nothing like what we see now. As everything expanded and took up more space, it cooled down. The tiny particles grouped together. They formed atoms. Then those atoms grouped together. Over lots of time, atoms came together to form stars and galaxies. The first stars created bigger atoms and groups of atoms. That led to more stars being born. At the same time, galaxies were crashing and grouping together. As new stars were being born and dying, then things like asteroids, comets, planets, and black holes formed 
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In this chapter we will explain how Space Agencies, Astronomers, Physics Scientist, Researchers or any stakeholders in this domain are looking to the Universe over the history. The overview on the mechanisms of how the universe is work, the laws that applied to it, what are the scientific explanations of the phenomenon and the events that observed within our galaxy. What been discovered in Astronomy, what are under study, what need more expl  |