Dark energy and the gravitational constant

In summary, the conversation discusses the potential effects of adjusting the values of dark energy and gravitational constant on the stability of the universe. It is suggested that increasing both values may not result in a balanced and sustainable universe. Instead, it is proposed that a slight increase in gravity and a significant increase in dark energy could potentially lead to a more favorable early universe, but could ultimately result in excessive expansion.
  • #1
windy miller
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Many have claimed that if dark energy was not so small then the universe would fly apart and we wouldn't be here.
However what if you increased the value of lambda and at the same increased the value of the gravitational constant ( or perhaps the amount of matter or dark matter in the universe) could that not compensate?
 
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  • #2
Not in a way that would give a nice universe after 13.7 billion years. Gravity is more relevant in the early universe, dark energy is more relevant in the later universe. If you just increase both, the universe collapses long before dark energy would become notable. If you increase gravity a bit and dark energy massively, the early universe gets better, but afterwards the universe expands way too much.
 
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Related to Dark energy and the gravitational constant

1. What is dark energy?

Dark energy is a mysterious form of energy that is thought to make up about 70% of the total energy in the universe. It is believed to be responsible for the accelerated expansion of the universe.

2. How is dark energy related to the gravitational constant?

Dark energy and the gravitational constant are both components of the equations that describe the behavior of the universe. The gravitational constant is a measure of the strength of gravity, while dark energy is thought to be the force driving the expansion of the universe.

3. How do scientists measure dark energy?

Scientists measure dark energy by observing the effects it has on the expansion of the universe. This can be done through various methods, such as measuring the distances and velocities of distant galaxies or studying the cosmic microwave background radiation.

4. Is dark energy a proven concept?

While the existence of dark energy is widely accepted in the scientific community, it is still a theoretical concept that has not been directly observed or measured. Further research and observations are needed to fully understand and prove the existence of dark energy.

5. What is the significance of understanding dark energy and the gravitational constant?

Understanding dark energy and the gravitational constant is crucial for understanding the overall behavior and fate of the universe. It can also help us gain a better understanding of the fundamental laws of physics and potentially lead to new discoveries and advancements in our understanding of the universe.

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