Birth of the Solar System. Evidence for the Big Bang. Outline 0) Introduction a) Purpose of this FAQ According to the welcome page of this archive, the talk.origins newsgroup is intended for debate about "biological and physical origins", and the archive exists to provide "mainstream scientific responses to the many frequently asked questions (FAQs) that appear in the talk.origins newsgroup".
Many current FAQs deal with questions about biological and geological origins here on Earth. This page will take a broader view, focusing on the the universe itself. Big Bang. According to the Big Bang model, the universe expanded from an extremely dense and hot state and continues to expand today.
The graphic scheme above is an artist's concept illustrating the expansion of a portion of a flat universe. The Big Bang is the scientific theory that is most consistent with observations of the past and present states of the universe, and it is widely accepted within the scientific community.