Big Crunch to Big Bang: Is Our Universe Eternal?

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SUMMARY

The discussion centers on the concept of the universe's lifecycle, specifically the transition from a Big Crunch to a Big Bang, and the potential for a "big bounce." The idea posits that if dark matter's gravitational pull causes the universe to contract to a singular point, quantum fluctuations could trigger a new expansion phase. However, participants emphasize that there is currently no empirical evidence supporting this theory, and prevailing scientific consensus indicates that the universe will continue to expand indefinitely.

PREREQUISITES
  • Understanding of dark matter and its gravitational effects
  • Familiarity with cosmological concepts such as the Big Crunch and Big Bang
  • Knowledge of quantum fluctuations and their implications in physics
  • Basic grasp of the Planck length and its significance in theoretical physics
NEXT STEPS
  • Research the implications of dark matter on cosmic expansion and contraction
  • Study the concept of quantum fluctuations in the context of cosmology
  • Explore the theories surrounding the Big Bounce and its scientific critiques
  • Investigate current evidence supporting or refuting the ongoing expansion of the universe
USEFUL FOR

Astronomers, physicists, cosmologists, and anyone interested in the theoretical frameworks surrounding the universe's origins and future.

navilon
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I was wondering, if the gravitational pull due to dark matter is greater and at some point the universe stops expanding and starts contracting(Big Crunch)..from galaxies to stars,from stars to planets,molecules,atoms etc.and it reaches the minimum length scale Plank (according to ST) to one single point (as the Big Bang).Is it possible from that point,due to quantum fluctuations to start expanding again?And if that is,,is it possible that our universe has experienced more than one Big Bang?
 
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This concept is known as big bounce, see the wikipedia article and its references for more information.
 
navilon said:
I was wondering, if the gravitational pull due to dark matter is greater and at some point the universe stops expanding and starts contracting(Big Crunch)..from galaxies to stars,from stars to planets,molecules,atoms etc.and it reaches the minimum length scale Plank (according to ST) to one single point (as the Big Bang).Is it possible from that point,due to quantum fluctuations to start expanding again?And if that is,,is it possible that our universe has experienced more than one Big Bang?

Possible, but there is zero evidence for it and everything points to continued expansion.
 

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