Final answer:
The most widely accepted date for the Big Bang is about 13.7 billion years ago. About 13.7 billion years ago, the Big Bang created the universe. This explosion was not an explosion of particles through space, but a rapid expansion of space itself.
Step-by-step explanation:
The most widely accepted date for the Big Bang is about 13.7 billion years ago. Current cosmological models place the Big Bang at the beginning of the universe, around 13.7 billion years ago. This explosion was not an explosion of particles through space, but a rapid expansion of space itself. The distances and velocities of the outward-going stars and galaxies permit us to estimate when all matter in the universe was once together-at the beginning of time.