What Happens After the Big Crunch?

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In summary, the conversation discusses the possibility of a big crunch occurring and its relationship to quantum mechanics and the accelerating universe. It is agreed that while it may be unlikely, it cannot be definitively ruled out due to the unpredictability of initial conditions. The idea of a symmetric universe is also mentioned.
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john88888
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after the big crunch occurs would everything be the exact same until another big crunch
 
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Academic is completely correct, even if the initial conditions were identical there is no reason the outcome should be.

But it's a moot point, since current data quite definitively shows that there will be no big crunch for our universe.
 
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the possibilities of big crunch is impossible to current under standing. b/c the universe it accelerating
 
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That doesn't mean its impossible, just very unlikely. Again, you cannot predict what will happen from initial (or current) conditions alone. :) It goes both ways.
 
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We could have big crunch in the past.
I like the idea that universe is symmetric, Universe wavefunction W is even: W(-t) = W(t)
 
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Unless the universe exists as a single structure with only one "bang" and "crunch", see the points about initial conditions.

Nabeshin: Unlikely, but not impossible, and until there is a satisfactory explanation for the cosmological constant or dark energy, it is merely unlikely, not definitive.
 

FAQ: What Happens After the Big Crunch?

What exactly is the "Big Crunch"?

The Big Crunch is a hypothetical scenario in which the universe, which is currently expanding, eventually stops expanding and begins to contract. This contraction would continue until all matter and energy are compressed into a single point, resulting in a massive explosion known as the Big Bang.

Is the Big Crunch a widely accepted theory?

No, the Big Crunch is not a widely accepted theory. It was proposed based on the assumption that the expansion of the universe would eventually slow down and reverse due to the force of gravity. However, current observations and measurements suggest that the universe is actually expanding at an accelerating rate, making the Big Crunch unlikely.

What would happen to life on Earth during the Big Crunch?

If the Big Crunch were to occur, life on Earth (and any other planets) would likely be destroyed. As the universe contracts, the extreme gravitational forces would cause matter to collapse and temperatures to rise to unimaginable levels. It is unlikely that any form of life could survive such extreme conditions.

What would happen after the Big Crunch?

After the Big Crunch, the universe would undergo a new Big Bang, essentially starting the cycle of expansion and contraction all over again. It is also possible that the universe could reach a state of maximum entropy, where all energy is evenly distributed and no further changes can occur.

Is there any evidence to support the Big Crunch theory?

While there is no direct evidence to support the Big Crunch theory, some scientists have suggested that the measurement and study of gravitational waves could potentially provide evidence for the eventual collapse of the universe. However, this is still a topic of debate and further research is needed.

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