Universe (Cosmology)

The universe is everything that exists—space, time, matter, and energy. Cosmology is the scientific study of the universe's origins, structure, evolution, and eventual fate. It explores how galaxies, stars, and planets formed after the Big Bang, about 13.8 billion years ago. The universe is vast and expanding, with galaxies moving away from each other. Scientists use observations and theories to understand its large-scale properties, underlying physics, and future. In short, cosmology seeks to explain how the universe came to be, how it works, and what might happen to it over time.