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Quarlep
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I posted recently on a banned topic, apologies for that. Under advisement of a mentor I've decided to ask a positive question instead, how do scientists estimate the total energy of the universe?"
They don't, as it's not possible. The total energy is an ill-defined concept in General Relativity.Quarlep said:I posted recently on a banned topic, apologies for that. Under advisement of a mentor I've decided to ask a positive question instead, how do scientists estimate the total energy of the universe?"
No. The phrase "Universe Total Energy is positive" is not something that can be evaluated as either true or false within General Relativity: by making different arbitrary choices, you can evaluate it as either true or false with the exact same configuration of the universe.Quarlep said:Energy density and curvature of the universe are connected . I know In FL equations . If density less than one than k will be negative. Is that means "Universe Total Energy is positive"
Quarlep said:Energy density and curvature of the universe are connected . I know In FL equations . If density less than one than k will be negative. Is that means "Universe Total Energy is positive"
Chalnoth said:They don't, as it's not possible. The total energy is an ill-defined concept in General Relativity.
Chalnoth said:Instead, cosmologists measure the energy density. This is estimated using a variety of methods. The most common are measurements of the expansion history and the spatial geometry of our universe.
Orodruin said:You can define a local energy density, but this will also depend on your frame of reference. In addition, even if you study a FRW universe and define the comoving frame as "the" frame, the energy density multiplied by the volume is not going to give you a constant.
Consider this analogy:Quarlep said:What do you mean about ill-defined? Is that show us GR is incomplete ?
You should seek medical attention. Some questions simply do not have answers at present and if you cannot sleep without them then you will suffer from insomnia.Quarlep said:I can't sleep well If I can't get an answer
Scientists use various methods to estimate the total energy of the universe, including observational data from telescopes and satellites, theoretical models, and mathematical calculations based on the laws of physics. They also take into account the different forms of energy, such as matter, radiation, and dark energy.
Dark energy is a hypothetical form of energy that is believed to be responsible for the accelerating expansion of the universe. Its existence is inferred from observations of distant supernovae and the cosmic microwave background. Scientists take into account the effects of dark energy when estimating the total energy of the universe.
The estimated total energy of the universe is constantly being refined and updated as new data and research become available. While there is still much we do not know about the universe, scientists have made significant progress in understanding its energy content. However, there is still a margin of error in these estimates due to the complex and ever-changing nature of the universe.
It is unlikely that the total energy of the universe can ever be measured with 100% certainty. This is due to the vastness and complexity of the universe, as well as the limitations of current technology and scientific understanding. However, as our knowledge and technology continue to advance, our estimates of the total energy of the universe will become more accurate.
Estimating the total energy of the universe is an important aspect of understanding the universe and its evolution. It allows scientists to better comprehend the fundamental laws of physics that govern the universe and how it has changed over time. By studying the energy content of the universe, scientists can also gain insight into the origins and fate of the universe.