Universe concepts

The universe is the vast expanse that includes all matter, energy, planets, stars, galaxies, and the space between them. It originated from the Big Bang, a massive explosion around 13.8 billion years ago. The universe is constantly expanding, meaning galaxies are moving away from each other. Gravity is the force that shapes its structure, holding celestial bodies like stars and planets together. The universe also includes phenomena like black holes, which are regions of intense gravity. Scientists study it through astronomy and physics to understand its origins, evolution, and possible future.