Big-bang theory is accepted by astronomical community, as the very first event in the Universe. It is believed that every thing in the universe that we see today, anything that ever exists in this universe have a common beginning Big bang. In the very beginning, an explosion had occurred, everything comes out from that event. Galaxies are moving far away from each other. Hence it is believed that they must be together at some point of time in the past. Whole universe was at a single point before big bang. This state of universe was in existence approximately 15 billion years ago. A sudden explosion started the journey of this universe. If you want to know about the reason of explosion refer to video below. From that point in time our universe is expanding i.e. galaxies are running away from each other at a very fast pace. One can wonder how scientists know that our universe is expanding. Reason behind this is Red Shift. To know more about red shift go to definitions page.
Our universe is about 15 billion years old. It had passed through a lot of different phases before reaching to the state in which it is today. It is very interesting journey. To know more about the big bang theory, refer to the video below. It provides tons of knowledge and very interesting also. Please comment if you like.
Our universe is about 15 billion years old. It had passed through a lot of different phases before reaching to the state in which it is today. It is very interesting journey. To know more about the big bang theory, refer to the video below. It provides tons of knowledge and very interesting also. Please comment if you like.