The Big Bang is the scientific theory that explains the origin and early development of the universe. According to this theory, the universe began as a singularity—an extremely hot and dense state—and has been expanding and cooling ever since. The Big Bang is not an explosion that occurred at a specific point in space but rather an expansion of space itself.
As for going back in time before the Big Bang, our current understanding of physics and the Big Bang theory suggests that time itself started with the Big Bang. This means that the concept of "before" the Big Bang may not be meaningful in the context of our current understanding of time. The Big Bang represents the earliest known moment in the universe's history, and it is not currently possible to determine what, if anything, existed prior to it.
It is important to note that our understanding of the nature of time and the physics at the earliest moments of the universe is an active area of scientific research, and theories continue to evolve as new discoveries are made.
If it were hypothetically possible to travel back in time to a point after the Big Bang, it is difficult to predict with certainty what would happen. Time travel concepts are highly speculative, and they often involve challenging paradoxes and logical inconsistencies. The consequences of time travel, if achievable, are subject to speculation and conjecture rather than scientific consensus.
It's worth noting that while time travel is a popular theme in science fiction, the scientific understanding of time and the practicality of time travel remains an open question in physics.