The Big Bang theory is the prevailing scientific model that explains the origin and evolution of the universe. According to this theory, the universe began as a singularity—an extremely hot and dense point—approximately 13.8 billion years ago. It then rapidly expanded, resulting in the formation of matter, energy, and the subsequent evolution of galaxies, stars, and other cosmic structures.
Regarding entropy, the concept of entropy is related to the measure of disorder or randomness within a system. In the context of the Big Bang, entropy is thought to have increased significantly during the event. As the universe expanded and cooled, it underwent a process known as cosmic inflation, during which the entropy increased exponentially. This rapid expansion and the subsequent formation of particles, atoms, and galaxies contributed to the increase in entropy.
Entropy tends to increase in isolated systems according to the second law of thermodynamics. From this perspective, the early universe, with its highly ordered and compressed state, had relatively low entropy. As the universe expanded, matter and energy became more dispersed, leading to an increase in entropy over time.
In terms of our current state of entropy in relation to the Big Bang, it is generally believed that entropy has continued to increase since the initial event. The expansion of the universe and the ongoing processes of cosmic evolution, such as the formation and dissolution of stars and galaxies, contribute to the overall increase in entropy. However, it's important to note that the precise details of entropy throughout the universe and its relation to the initial conditions of the Big Bang are still subjects of ongoing scientific research and investigation.