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Aditya Vishwak
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Dark Energy is concept of total nuisance to physicist, deriving no crystal-clear concept to stand on.
So why are wasting a loads of time and effort on it?
So why are wasting a loads of time and effort on it?
Why do you think the cosmological constant isn't a crystal-clear concept?Aditya Vishwak said:Dark Energy is concept of total nuisance to physicist, deriving no crystal-clear concept to stand on.
Certainly. But they've all failed.Aditya Vishwak said:But friends, are their any alternative to the Dark Energy concept?
Aditya Vishwak said:Dark Energy is concept of total nuisance to physicist, deriving no crystal-clear concept to stand on.
So why are wasting a loads of time and effort on it?
In addition to Chalnoth's list, there have also been attempts to tweak the geometry side of the Einstein equations. Such approaches are known as "modified gravity", and they appeal to higher-order curvature terms. Perhaps someone else can comment on their overall success, but my impression is that they have generally met with difficulty.Aditya Vishwak said:But friends, are their any alternative to the Dark Energy concept?
Aditya Vishwak said:So dark energy is said to be a sort of energy. So how can energy accelerate the expansion of our universe? Plz do not underestimate the question.
Why can't energy accelerate the expansion of the universe? What physical misunderstanding are you struggling with that compels you to challenge this?Aditya Vishwak said:So dark energy is said to be a sort of energy. So how can energy accelerate the expansion of our universe? Plz do not underestimate the question.
Consider a type of energy density that is constant, and does not change with expansion, and imagine that said energy density is the only stuff around. The Friedmann equation for this situation is:Aditya Vishwak said:So dark energy is said to be a sort of energy. So how can energy accelerate the expansion of our universe? Plz do not underestimate the question.
Conservation of energy isn't a law that applies in a curved space-time.Aditya Vishwak said:So dark energy is some sort of energy pushing the boundaries of space-time. But I have heard that energy never gets destroyed or gets created, so does it mean that the Dark Energy is eternal?
Dark energy is a hypothetical form of energy that is thought to make up around 70% of the total energy in the universe. It is believed to be responsible for the accelerating expansion of the universe.
Dark matter and dark energy are two different concepts that are often confused. Dark matter is a type of matter that is invisible and does not interact with light, while dark energy is a form of energy that is believed to exist in all space and is responsible for the expansion of the universe.
Dark energy is a nuisance to physicists because it is a mysterious and unexplained phenomenon that challenges our current understanding of the universe. Its existence has been inferred through observations, but its nature and properties are still largely unknown.
Scientists study dark energy through observations of the expansion of the universe using various methods such as measuring the distance and brightness of Type Ia supernovae, mapping the cosmic microwave background radiation, and studying the large-scale structure of the universe. These observations can help us understand the effects of dark energy on the universe.
The existence and properties of dark energy have significant implications for the future of the universe. If dark energy continues to drive the expansion of the universe, it could result in the "big rip" scenario where the universe expands at an accelerated rate and eventually tears apart. However, there are other theories and models that suggest different outcomes, and more research is needed to understand the true impact of dark energy on the future of the universe.