Could a Variable G Explain Dark Energy and Matter in Our Universe?

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SUMMARY

The discussion centers on the implications of altering the gravitational constant, Big G, on the universe's structure and existence. Participants argue that changing G would lead to a fundamentally different universe, potentially one that could not sustain itself. The conversation also explores the hypothesis that Dark Energy and Dark Matter might be explained by a variable G, suggesting that G could function as a distance-dependent variable rather than a constant. This perspective opens up new avenues for understanding cosmic phenomena.

PREREQUISITES
  • Understanding of gravitational constants, specifically Big G
  • Familiarity with concepts of Dark Energy and Dark Matter
  • Basic knowledge of cosmology and universal structure
  • Awareness of theoretical physics and its implications
NEXT STEPS
  • Research the implications of variable gravitational constants in theoretical physics
  • Explore models of Dark Energy and Dark Matter in contemporary cosmology
  • Study the mathematical framework behind gravitational theories
  • Investigate current experiments and observations related to cosmic expansion
USEFUL FOR

Astronomers, theoretical physicists, and cosmologists interested in the fundamental forces of the universe and the nature of cosmic phenomena.

peter_geek
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What would happen to the universe if the physical constant of Big G was changed?
 
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We would be in a very different Universe - probably one which wouldn't exist for very long.
G is a fundamental constant which relates mass space and time in our theories.
I do wonder whether the evidence for the existence of Dark Energy and Dark Matter, and all of that is a very open question at the moment afaik. Perhaps it could be explained by G not being actually a constant but a function of distance.
I won't fall into the trap of saying what the situation 'really is' but perhaps a variable G could give a model (for them as are smart enough) which does without Dark Stuff.
 

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