Question on: SS1 Physics - Space Physics and Astronomy

The Big Bang theory proposes that the universe originated from a singularity, a point of infinite density and temperature, approximately 13.8 billion years ago. According to this theory, the universe has been expanding ever since, cooling down and allowing matter and energy to form. The Big Bang theory is supported by various lines of evidence, such as the observed redshift of distant galaxies, the abundance of light elements, and cosmic microwave background radiation. It provides a comprehensive framework for understanding the evolution and structure of the universe.