The concept of a singularity and the origin of the universe are complex and still the subject of ongoing scientific research and theoretical speculation. Our current understanding is based on the Big Bang theory, which proposes that the universe originated from a singularity, an extremely dense and hot state.
According to the Big Bang theory, the universe as we know it began as a singularity, a point of infinite density and temperature. However, our understanding of physics breaks down when attempting to describe the conditions at that moment. The singularity represents a boundary beyond which our current understanding of the laws of physics cannot provide a complete explanation.
The term "popped into existence" is not an accurate description of the Big Bang. Rather, the singularity represents the beginning of the expansion of the universe. The universe emerged and started expanding from an incredibly hot, dense state. This expansion has continued over billions of years, leading to the formation of galaxies, stars, and eventually the complex structures we observe today.
It's important to note that the concept of "nothing" can be challenging to define in the context of the universe's origin. In physics, empty space is not truly empty but rather contains fluctuating fields and particles that arise from quantum mechanical effects. These fluctuations can lead to the creation of particles and energy even in the absence of pre-existing matter.
While the specific details of how the singularity gave rise to the universe are still not fully understood, scientists continue to investigate and refine our understanding through observations, experiments, and theoretical models. The study of cosmology, astrophysics, and particle physics aims to uncover more about the origins and evolution of the universe.