Big Bang model

The Big Bang model describes the origin of our universe as a rapid expansion starting about 13.8 billion years ago from an extremely hot, dense state. It wasn’t an explosion into space but rather space itself expanding. Over time, the universe cooled and matter formed, leading to stars, galaxies, and planets. This model is supported by evidence such as cosmic background radiation and the observable expansion of galaxies. Essentially, the Big Bang explains how our universe evolved from a initial dense state into the vast, expanding cosmos we observe today.