The concept of "something outside the universe" is a topic of philosophical and scientific debate. Our understanding of the universe is limited by the knowledge and observations available to us. Currently, the prevailing scientific view is that the universe, as we understand it, encompasses all of space, time, matter, and energy.
According to the Big Bang theory, the universe originated from a singularity—an extremely dense and hot state—approximately 13.8 billion years ago. Since then, the universe has been expanding. However, our knowledge of what lies beyond the observable universe is limited due to the finite speed of light and our current technological capabilities.
When scientists refer to the universe, they typically mean the observable universe, which is the portion of the cosmos that we can potentially observe. This observable universe has a finite extent because light from distant regions has not had enough time to reach us since the beginning of the universe.
Speculating about what lies beyond the observable universe is a topic of scientific and philosophical speculation. Some theories suggest the possibility of a multiverse, where our universe is just one of many existing in a larger framework. However, it is essential to note that such concepts are still under scientific investigation and remain speculative at this point.
It's important to approach questions about the nature of the universe with an understanding of the limitations of our current knowledge and the ongoing scientific exploration and inquiry into these profound questions.