What came before the big bang?Has the universe existed forever? Or was there som...

Questions

March 2021 1 27 Report

What came before the big bang?
Has the universe existed forever? Or was there something before it?

I don't want nonsense answers. (I'll delete it)
I need smart answers or another question for this question :)

Answers & Comments

xhean1013

Verified answer

Answer:

There is still no concrete answer to that question, as our technology isn't yet that advance to study what is really beyond Earth. Though there are 3 theory on what will happen to the future of our universe. I will relate those 3 to the possibility of "previous" universe.

Scenario no. 1: Big Freeze or Heat death.

In this scenario, there is no previous universe. The expansion of the universe is exponential that it even affects the molecular level, meaning, it rips the atom itself that if this continues fusion of atoms will be impossible, thus ending the star cycle.

Scenario no. 2: Big Rip

In this scenario, there is no previous universe. The expansion between galaxies is not enough to destroy atom but, enough to create space between them that might, in the very far future, will stop the star cycle.

Scenario no. 3: Big Crunch

In this scenario there is a possibility that universe existed before big bang. In here, the universe will continue to expand but, at a certain point the gravity will dominate and will start pulling everything at the center. It will be hotter contrary to the first scenario. As the time goes on the universe will collapse into singularity that may in turn, start a new big bang. If this theory is right then, we will never know in what order are we in the cycle as everything is erased then started a new.

You might wonder why is it hard to predict the true end and start of universe?

Chaos Theory - it is impossible to compute everything as just one decimal will skew everything, example of this would be $1.1^{20} =6.72749994932560009201$ and $1.01^{20}= 1.2201900399479668244827490915526$ the difference of outcome between the 2 is noticeable, meaning we have to try all possibilities of equation just to pinpoint where did everything started and where will it end.
Technological Barrier - the technology we have right now, especially the processing computer, they are not enough, the processes they do is just a miniscule compared to what is actually needed. But with the breakthrough of Quantum Computers, we might be able to, at least, overcome this barrier.
The possibilities are infinite - In predicting weather, it will be impossible to do so in more than a week, every day that passes from the point of prediction, the less likely the probability of it will happen. Meaning it's just the weather but how about the vastness of universe, and everything in it? How can we take everything in calculation? We still don't even know what is "dark energy" and it's origin which the scientists suspects that it is the culprit in the expansion of the universe.