A given scientific theory about the origin of the universe. The Big Bang Theory in Physical Cosmology is a scientific theory given about the origin of the universe. One of the features of this theory is the emergence of the universe at a particular moment, rather than a continuous process. According to this theory, the universe was created from a very dense and heated state about 13.75 billion years ago. Scientist Edwin Hubble I said that a comprehensive review of the velocities of distant galaxies shows that they are moving away from each other, meaning that the universe is expanding. This is explained by the Friedmann-Lametre-Robertson-Walker metric of the general theory of relativity. Analyzing the past with the help of these theories, it can be seen that the entire universe has originated from a very ancient point state. In this state all matter and energy were very hot and dense. But there is no consensus among physicists on what happened before. However, the term gravitational singularity has been proposed to explain the earlier period of general relativity. The term "Big Bang" literally refers to the super-powerful explosion of one of the oldest points through which the universe was created . This explains the structure of the oldest objects in the universe , for which the alphabet-bet-gamf theory was developed after the Big Bang theory. A significant consequence of the Big Bang is that the current state of the universe is completely different from the state of the past and future. It was through this theory that George Gamf was able to infer in 1947 that cosmic microwave background radiation existed. It was discovered in the 1960's and was able to substantiate the Big Bang theory by rejecting much of the static theory.