It has been theoretically calculated that the Universe would have originated from a single mass of about 13.798 ± 0.037 billion years ago. This single mass suddenly exploded and the fragmented particles flying in all directions as a result of this explosion formed stars, planets, and galaxies. This theory that explains the formation of the universe due to the explosions of a single mass is known as the Big bang theory.
To begin with, there are major pieces of evidence that support the Big Bang theory. First of all, we are logically convinced to accept the actuality that the Universe had a starting point. Second, as specified by the Big Bang theory, if this universe was extremely hot then we should be able to find the heat remains. The discovery of a 2.725 degree Kelvin Cosmic Microwave Background radiation (CMB) by two radio astronomers Arno Penzias and Robert Wilson in 1965 pervaded the observable universe. This is considered to be one of the remains that scientists were searching for. Third, almost all the galaxies present inside this universe seem to be drifting away from us at speeds proportional to their distance. It is known as “Hubble’s Law” which is titled after Edwin Hubble, who created this phenomenon in 1929. This observation by him promotes people to believe in the expansion of the Universe and indicates that the universe we are living in was once compacted. Lastly, the abundant presence of the Helium and Hydrogen, collectively known as light elements, found in the observable universe sustains the Big Bang theory.
Furthermore, there are several misconceptions about the Big Bang theory. Most of the people tend to imagine a giant explosion. According to the experts, no explosion took place; there was an expansion that is still continuing. Rather than assuming a balloon popping and discharging all the contents present inside it, visualize a balloon inflating. There was a small balloon that expanded to the size of the Universe we currently live in. However, all we certainly understand is that we are surviving inside it and at one time it didn’t have an existence and neither did we.
To sum up, it is believed that the Universe had its beginning about 14 billion years ago. Before that time, the entire Universe was situated inside a small bubble or balloon which was insanely dense and hot. Unpredictably, this balloon started to enlarge and this expansion created what we know as the Universe. But according to Hinduism, the world’s oldest religion, Lord Brahma is the creator of this Universe. However, many Hindus accept that the Big Bang theory has offered no challenge to their reliance on creation. It is a scientific theory that sits beside their religious convictions.