The current scientific understanding, based on the Big Bang theory, suggests that all the matter and energy in our observable universe originated from a single event known as the Big Bang. According to this theory, the universe began as an extremely hot and dense state approximately 13.8 billion years ago. From that initial singularity, the universe rapidly expanded and cooled, eventually leading to the formation of galaxies, stars, planets, and other cosmic structures.
In this framework, it is not considered that multiple Big Bang events occurred to create the matter we observe. Instead, the expansion and evolution of the universe following the initial singularity led to the formation of the structures we observe today.
It's important to note that while the Big Bang theory provides a well-supported explanation for the early stages of the universe's development, there are still open questions and ongoing research regarding specific details of cosmic evolution. Scientists continue to investigate and refine our understanding of the processes that led to the formation of galaxies, stars, and planets.