Hot Big Bang Model

The Hot Big Bang Model describes how the universe began as an extremely hot, dense state about 13.8 billion years ago, then expanded and cooled over time. Initially, all matter, energy, space, and time were concentrated in a tiny point. As it expanded, particles formed atomic nuclei and eventually atoms, leading to the formation of stars, galaxies, and planets. The universe’s ongoing expansion and cooling help explain the cosmic microwave background radiation—a faint glow of leftover heat from the early universe—and the distribution of galaxies we observe today. It’s a well-supported framework for understanding our universe’s origins and evolution.