Approximately how long ago did the universe begin according to the Big Bang Theory?
Answer
13.8 billion years ago
The dominant model of the Big Bang posits that the universe commenced its expansion approximately 13.8 billion years ago.
Related Questions
Does the Big Bang Theory describe the absolute beginning of everything?Approximately how long ago did the universe begin according to the Big Bang Theory?What was a key prediction of the Steady State theory regarding cosmic background radiation?Which observation serves as one of the three primary pillars of evidence supporting the Big Bang Theory?What term describes the process that made the universe transparent, allowing light to travel freely for the first time?What mechanism is proposed in the Oscillating or Cyclic Universe theory?What period immediately followed the initial expansion, characterized by exponential growth that smoothed the early cosmos?What does Hubble's Law observation directly imply about the history of the universe?The Big Bang Theory's description of the universe relies on reliable physics up to which theoretical time limit?What scientific quest seeks the successor theory to the Big Bang that can explain the true origin event?