The universe facts

Evidence Of Expansion Of Universe.    How the universe began  The current scientific understanding of the universe's creation is based on the Big Bang theory. According to this theory, the universe began as an infinitely hot and dense point, called a singularity, about 13.8 billion years ago. At this point, all matter, energy, space, and time existed in a state of extreme compression. Then, the universe began to expand rapidly, cooling down and allowing particles to form. This process is called inflation. As the universe expanded and cooled, protons, neutrons, and electrons formed and combined to form atoms. The universe continued to expand and cool, and over time, stars and galaxies formed. The Big Bang theory is supported by a wealth of evidence, including observations of the cosmic microwave background radiation and the observed abundance of light elements. However, there are still many unanswered questions about the universe's creation, such as what caused the Big Ban...