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In these models, the quintessence field has a density which closely tracks (but is less than) the radiation density until matter-radiation equality, which triggers quintessence to start having characteristics similar to dark energy, eventually dominating the universe. This naturally sets the low scale of the dark energy. [12]
The fraction of the total energy density of our (flat or almost flat) universe that is dark energy, , is estimated to be 0.669 ± 0.038 based on the 2018 Dark Energy Survey results using Type Ia supernovae [7] or 0.6847 ± 0.0073 based on the 2018 release of Planck satellite data, or more than 68.3% (2018 estimate) of the mass–energy density ...
Under this scenario, dark energy would ultimately tear apart all gravitationally bound structures, including galaxies and solar systems, and eventually overcome the electrical and nuclear forces to tear apart atoms themselves, ending the universe in a "Big Rip". On the other hand, dark energy might dissipate with time or even become attractive.
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In physical cosmology, the dark-energy-dominated era is proposed as the last of the three phases of the known universe, the other two being the radiation-dominated era and the matter-dominated era. The dark-energy-dominated era began after the matter-dominated era, i.e. when the Universe was about 9.8 billion years old. [ 13 ]
Dark fluid is not analyzed like a standard fluid mechanics model, because the complete equations in fluid mechanics are as of yet too difficult to solve. A formalized fluid mechanical approach, like the generalized Chaplygin gas model, would be an ideal method for modeling dark fluid, but it currently requires too many observational data points for the computations to be feasible, and not ...
Forms of matter that are poorly understood, such as dark matter and mirror matter. Ordinary matter that when placed under high pressure, may result in dramatic changes in its physical or chemical properties. Degenerate matter; Exotic atoms
It is one of the components of an esoteric description of the "subtle body", which consists of nadis (energy channels), chakras (psychic centres), prana (subtle energy), and bindu (drops of essence). Kuṇḍalinī is described as being coiled up at the base of the spine. The description of the location can vary slightly, from the rectum to the ...