The Big Bang is considered as a start all: About 13.8 billion years ago, the detectable shape went boom and expanded until they are.
But what were things like before the Big Bang?
Short answer: We don't know. Long answer: Many things could be there, each of them bending in its own way. [How Massive Is the Milky Way?]
The first thing that is understood is what really was in the Big Bang.
"The Big Bang is a moment, not a point in space," said Sean Carroll, a theoretical physicist in the California Institute of Technology and author of "The Big Picture: The Origins of Life, Meaning and the Self Earth" (Dutton, 2016).
So scrap the image of a tiny speck of dense material suddenly exploding out in void. One thing, perhaps the universe at the Big Bang was not very small, Carroll said. Certainly everything in the shape was observable today – a sphere with a diameter of about 93 billion light years with at least 2 trillion galaxies – made in space less than a centimeter across. But there may be plenty outside the observable universe that Earthlings can't see because it is physically impossible to have the light traveling long in 13.8 billion years.
Therefore, the universe at the Big Bang may have been slightly or big, Carroll said, because there is no way to look back in time at what we cannot see today. We all know that it was very close, very close and that it got less quickly.
As corollary, there is nothing outside the universe really, because the universe is, by definition, everything. So at the Big Bang, everything was closer and warmer than it is now, but there was no "outside" there anymore than today. As you are trying to take a verbal opinion and imagine you could stand void and look at the scrunched-up baby universe before the Big Bang, which would be impossible, Carroll said. The universe did not expand into space; the space itself was expanded.
"No matter where you are in the universe, if you come back 14 billion years, you come to this point when it was very hot, compact and rapidly increasing," he said.
No one knows exactly what was happening in the universe until the second after the Big Bang, when the globe cool enough to protons and neutron to collision and paste together. Many scientists believe that the universe went through an exponential expansion process called inflation during the first two. This would streamline the time frame of space and explain why the material is evenly distributed evenly in the universe today.
Before the bang
It may be an infinite stretch of ultrasound, a compact material, before the Big Bang, staying in a stable state until the Big Bang happened for some reason. Perhaps the non-compact universe was controlled by quantum mechanics, physics of a very small scale, Carroll said. The Big Bang, then, and the moment that classical physics took hold of it as the main driver of evolution of the universe. [What Is Quantum Mechanics?]
For Stephen Hawking, this moment was all involved: Before the Big Bang, he said, events are non-measurable, so they are not defined. Hawking gave the infinite suggestion: He said there is a time limit to time and space, but there are no limits or starting points or finished, as the planet Earth is finite but has no edge.
“Since the Big Bang events have no observational consequences, they can be cut off from the theory and say that the time started at the Big Bang,” he said in an interview on the National Geographic show “ StarTalk ”in 2018.
Or maybe there was something else there before the Big Bang is worth to be thinking. One view is that the time was not the time of the Big Bang, but that it was a moment of symmetry. In this idea, before the Big Bang, there was another universe there, which was identical to this one but with heterogeneity increasing towards the past rather towards the future.
Increasingly entropy, or increased disorder in a system, said Carroll is essentially a time arrow, so in this mirror universe, the time before the globe would run in the modern universe and our universe would have been in the past. . This theory also suggests that the mirror globe would have other properties of the globe flip-flopped. For example, physicist David Sloan wrote in the Oxford University Science Blog, and molecules and ions (called nuisances) would have asymmetries in opposite orientations to what they are in our universe.
A related theory states that the Big Bang was not the beginning of everything, but where the universe shifted from crapping to an extended period. The notion of "Big Bounce" gives this impression that Big Bangs may be infinite as it expands, expands and expands the world again. The problem with these ideas, Carroll, is that there is no explanation of why or why a universe expanding contract and returning to a low-entopy state would.
Carroll and his colleague Jennifer Chen have a pre-Big Bang vision. In 2004, the physicists recommended that the universe as we know it is a descendant of a parent who has spare time.
It is like a rotting radioactive nucleus, Carroll said: When a nucleus hits, it turns out an alpha or beta particle. The exact mothers could do the same, except for particles, it goes out of the whole globe, perhaps inevitably. "There's only quantum volatility that allows it to happen," Carroll said. All of this universe is "parallel to parallel accuracy," Carroll said, and it does not interact with each other.
If that is very similar to each of them, that is – because scientists still have no way to go back to the merits of the Big Bang, much less than what came before him. However, there is space to explore Carroll. Gravitational waves open from powerful galaxy collisions in 2015, it is possible that these waves could be used to solve the underlying mysteries of global expansion in that first key.
Theoretical physicists also have work to do, said Carroll, like making a more accurate prediction of how quantum forces like quantum gravity could work.
"We don't even know what we're looking for," said Carroll, "until we have a theory."
First published Live Science.