Simplified Universe

The universe is generally defined as all of space and time and their contents. This includes all forms of matter and energy, from sub-atomic particles to immense structures like galaxies and galactic filaments, as well as the fundamental physical laws that govern them. It represents the totality of existence—everything that exists, has existed, and will exist. In physical cosmology, a cosmological model is a description of the largest-scale structures and dynamics of the universe.