Question

If the Universe was born at the Big Bang, what existed before then?

Answer 1

Our universe was born about 13.7 billion years ago in a massive expansion that blew space up like a gigantic balloon.

That, in a nutshell, is the Big Bang theory, which virtually all cosmologists and theoretical physicists endorse. The evidence supporting the idea is extensive and convincing. We know, for example, that the universe is still expanding even now, at an ever-accelerating rate.

Scientists have also discovered a predicted thermal imprint of the Big Bang, the universe-pervading cosmic microwave background radiation. And we don't see any objects obviously older than 13.7 billion years, suggesting that our universe came into being around that time.

Answer 2

Hey mate here us your answer
It took quite a bit more than seven days to create the universe as we know it today. SPACE.com looks at the mysteries of the heavens in our eight-part series: The History & Future of the Cosmos. This is Part 5 in that series.

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