If the universe was born at the big bang, what existed before then?? Elaborate the answer in ur own words.
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Answers
Explanation:
Before the Big Bang?
While much about the universe's first few moments remains speculative, the question of what preceded the Big Bang is even more mysterious and hard to tackle.
For starters, the question itself may be nonsensical. If the universe came from nothing, as some theorists believe, the Big Bang marks the instant when time itself began. In that case, there would be no such thing as "before," Carroll said.
But some conceptions of the universe's birth can propose possible answers. The cyclic model, for example, suggests that a contracting universe preceded our expanding one. Carroll, as well, can imagine something existing before the Big Bang.
"It could just be empty space that existed before our Big Bang happened, then some quantum fluctuation gave birth to a universe like ours," he said. "You can imagine a little bubble of space pinching off through a fluctuation and being filled with just a little tiny dollop of energy, which can then grow into the universe that we see through inflation."
Filippenko also suspects something along those lines might be true.
"I think time in our universe started with the Big Bang, but I think we were a fluctuation from a predecessor, a mother universe," Filippenko said.
Will we ever know?
Cosmologists and physicists are working hard to refine their theories and bring the universe's earliest moments into sharper and sharper focus. But will they ever truly know what happened at the Big Bang?
It's a daunting challenge, especially since researchers are working at a 13.7-billion-year remove. But don't count science out, Carroll said. After all, 100 years ago, people understood very little about the universe. We didn't know about general relativity, for example, or quantum mechanics. We didn't know the universe was expanding, and we didn't know about the Big Bang.
"We know all these things now," Carroll said. "The pace of progress is actually astonishingly fast, so I would never give in to pessimism. There's no reason in the recent history of cosmology and physics to be pessimistic about our prospects for understanding the Big Bang."
Albrecht voiced similar optimism, saying we may one day even figure out what, if anything, existed before the Big Bang.
The universe had a distinct beginning . After looking backward, we can say that , before our universe there was nothing, nothing at all, not even time itself.
It's like our entire Universe was microscopic , just like an atom.
But, it is said that, the gravitational force exist before the big bang.
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