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

In summary, changing the physical constant of Big G would drastically alter the universe, potentially leading to its non-existence. This constant is fundamental in connecting mass, space, and time in our theories. There is ongoing speculation that the existence of Dark Energy and Dark Matter could be explained by G not being a constant, but rather a function of distance. While the true nature of this situation is uncertain, a variable G could potentially provide a model that does not require the concept of Dark Matter and Dark Energy.
  • #1
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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  • #2
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.
 

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

1. What are physical constants?

Physical constants are numerical values that are used to describe the fundamental properties of the physical universe. They are universal and unchanging, and are used in various scientific equations and theories.

2. Can physical constants change?

According to current scientific understanding, physical constants are considered to be fixed and unchanging. However, there are some theories that suggest the possibility of physical constants changing in extreme conditions, such as the early universe or in black holes.

3. How do we measure physical constants?

Physical constants are measured through experimental methods using specialized equipment and techniques. These measurements are then compared and refined over time to increase accuracy and reduce uncertainty.

4. Why are physical constants important?

Physical constants are important because they provide a framework for understanding the physical world and allow for the development of scientific theories and models. They also play a crucial role in technology and engineering, as they are used to design and create various devices and systems.

5. Have physical constants always been the same?

The current scientific consensus is that physical constants have remained constant throughout the history of the universe. However, some theories suggest that they may have varied in the early universe or in certain extreme conditions. Further research and experimentation is needed to fully understand the nature of physical constants.

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