What would it be like for us during The Big Crunch?

Question

I'm calling all of you scientists to give me an idea about this one, and I do so with humble respect for your abilities to understand theories like The Big Bang (Whisper), the Expansion, and the ideas about the future of our universe.

For this question, I'm assuming that The Big Crunch theory is correct, that after the expansion, we will begin to contract. I'm asking you to assume that the event begins to occur right now. Would all life on Earth end? Or would we simply begin to get smaller? We don't notice ourselves expanding, so would we notice contraction? Would life go on without much change as we began our journey toward the center of the universe?

Please feel free to be imaginative, but base your ideas in actual science. When I study this subject, I get lost in all of the math and scientific terms for which I have no background. That's why I need you.

Thanks! Again, I respect any mind that can comprehend the incomprehensible.

Answer 1

it is thought that big bang was the first to happen. but that's wrong. 'baryogenesis' happened before the big bang where all the baryons came to outnumber their antiparticles and is called baryogenesis. in contrast to a process by which leptons account for the predominance of matter over antimatter is called leptogenesis, which all occured in the very early universe.

later the big bang happened where the all matter and antimatter came together to the size of a nut shell and blasted and the universe formed which is still expanding today.

hence big crunch is the reverse of big bang where the universe will contract. if the universe is finite in extent and the cosmological principle does not apply, and the expansion speed does not exceed the escape velocity, then the mutual gravitational attraction of all its matter will eventually cause it to contract. this is all because entropy continues to increase in the contracting phase, the contraction would appear very different from the time reversal of the expansion. while the early universe was highly uniform, a contracting universe would become increasingly clumped.

eventually all matter would collapse into black holes, which would then coalesce(meaning mix together) producing a unified black hole or big crunch singularity.



but some theorize that the universe could collapse to the state where it began (big crunch) and then initiate another big bang, so in this way the universe would last forever, but would pass through phases of big bang and big crunch.



this is all can be said about big crunch. of course no organism in the universe(even aliens) will live when big crunch will happen. more about this can be said only after the big crunch happens.

Answer 2

Interesting how the new orthodoxy despises alternatives. Both Steady State and Big Crunch hypotheses still have supporters and are still valid viewpoints.

If the Big Crunch theory is correct it will be hundreds of millions of years before it is certain and thousands of millions of years for the collapse.

So if the Big Crunch happened we would either have gone extinct as a species (the sun would be long gone) or evolved into something our current forms would not comprehend.

Answer 3

The actual science is the universe's expansion is accelerating. The big crunch is dead.

Answer 4

First of all it's supposed to be the big rip not the big crunch.And the human race will probably be dead by then