What formulas would apply during a Big Crunch

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SUMMARY

The discussion centers on the theoretical implications of a Big Crunch, specifically the equations governing the collapse of the universe. Participants assert that the Friedmann equations, which describe both the Big Bang and Big Crunch scenarios, are essential for understanding this phenomenon. Kurt Ludwig emphasizes that mass does not increase with speed and that the concept of relativistic mass is unnecessary. The conversation highlights the need for simplified solutions to the Friedmann equations to facilitate calculations related to rate inflation and deflation during a Big Crunch.

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  • Understanding of Friedmann equations in cosmology
  • Basic knowledge of general relativity
  • Familiarity with concepts of cosmic expansion and contraction
  • Mathematical skills to interpret differential equations
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  • Explore simplified solutions to the Friedmann equations for rate calculations
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Astronomers, physicists, and students of cosmology interested in the dynamics of the universe's expansion and contraction, particularly those exploring theoretical models like the Big Crunch.

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During a hypothesized big crunch, how quickly will a universe collapse? As the velocity approaches the speed of light, its mass will increase greatly. What equations will apply in such a collapse?
Kurt Ludwig
 
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  1. A Big Crunch is not compatible with our current knowledge of the content of the Universe.
  2. It would not happen with ”a speed”, it would happen with a rate.
  3. Mass does not increase with speed. Relativistic mass is an unnecessary concept.
  4. A Big Crunch would be described by the exact same equations as the Big Bang, the Friedmann equations.
 
How is the rate calculated? The Friedmann equations are above my mathematical skill level. Is there a solution of the Friedmann equations that simplify the rate inflation/deflation calculations?
Kurt Ludwig
 

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