What is the constituent material of the universe?

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The universe is composed of approximately 5% baryonic matter, 25% non-baryonic matter, and 70% dark energy. Current theories attempt to explain dark energy and non-baryonic matter, but none have been conclusively verified through observation. Dark energy is often associated with a small cosmological constant in Einstein's general relativity, although there are significant discrepancies regarding its expected size. Resources like hep-ph/0312013 from arXiv can provide further insights into these topics. Understanding these components is crucial for grasping the universe's fundamental structure.
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What is the constituent material of the universe? Is the material all exists on tangiable?
please any answers will aid me thanks
 
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Current estimates are that the universe is about 5% baryonic (ordinary) matter, about 25% non-baryonic matter, and 70% dark energy. Physicist and astronomers have proposed various theories to describe the two latter components, but nothing has yet been verified by observation.
 
What is dark energy? do you have any links that would be able to help me out in understanding it?
thanks
 
For the latest on non-baryonic (dark) matter, hep-ph/0312013 from arXiv (use google to get arXiv). In this article are references to dark energy as well. The most favored explanation for dark energy is the presence of a small cosmological constant in Einstein's general relativity. However, there are some serious problems relating to the size of the constant. For dark energy, it is about 50-60 orders of magnitude smaller than other theory expects.
 

Thread 'Matter density right after the decoupling'

https://en.wikipedia.org/wiki/Recombination_(cosmology) Was a matter density right after the decoupling low enough to consider the vacuum as the actual vacuum, and not the medium through which the light propagates with the speed lower than ##({\epsilon_0\mu_0})^{-1/2}##? I'm asking this in context of the calculation of the observable universe radius, where the time integral of the inverse of the scale factor is multiplied by the constant speed of light ##c##.
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Thread 'Hubble Constant, Dark Energy and the Expanding Universe'

Why was the Hubble constant assumed to be decreasing and slowing down (decelerating) the expansion rate of the Universe, while at the same time Dark Energy is presumably accelerating the expansion? And to thicken the plot. recent news from NASA indicates that the Hubble constant is now increasing. Can you clarify this enigma? Also., if the Hubble constant eventually decreases, why is there a lower limit to its value?
View full post »

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