Universe

The universe refers to the totality of all existence, encompassing all matter, energy, planets, stars, galaxies, and the vast void of space that contains them. It includes everything that is observable and measurable, as well as phenomena beyond current understanding. The universe is often described in terms of its large-scale structure, such as clusters of galaxies and cosmic backgrounds. It is also characterized by physical laws and constants, including gravity, electromagnetism, and the fundamental forces of nature. The concept of the universe is central to cosmology, the scientific study of its origins, evolution, and eventual fate, which explores theories such as the Big Bang and dark energy. The universe is vast and largely unexplored, with estimates placing its diameter at around 93 billion light-years, though it may be much larger or even infinite beyond observable limits. The universe is not just a physical space, but also the backdrop for the existence of life and consciousness as we know it.