Universe Development refers to the process by which the universe has evolved since its inception. It began with the Big Bang, approximately 13.8 billion years ago, leading to the formation of fundamental particles and the first atoms. Over time, these atoms coalesced to form stars and galaxies, creating the vast cosmic structures we observe today. As the universe continued to expand, it underwent various stages, including the formation of galaxies, solar systems, and eventually planets like Earth. The development of the universe is marked by events such as the creation of heavy elements in stars and the emergence of life, shaping the cosmos into its current state.