The Big Bang is the current explanation of cosmogenesis which outlines how the universe came into existence. In this model, the universe started off as a hot and a compact point that is about 13 billion years ago. Created 8 billion years ago and has grown over time. This situation had all the material and energy of the universe and started expanding very quickly in a process called inflation.

With the expansion of the universe, it tended to cool down and eventually atoms formed with subatomic particles which gave birth to simple elements such as hydrogen and helium. Gradually, these elements combined with the forces of gravity to build stars and galaxies.

Some essential facts that support Big Bang theory include the cosmic microwave background radiation that is the residual heat from the Big Bang explosion as well as red shift which is evidence that stars and galaxies are still moving away from each other.

The concept of the Big Bang is a cornerstone of modern cosmology because it offers a plausible account for the structure of the universe, the formation of galaxies, as well as the distribution of cosmic microwave backgrounds.