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- Dark-energy-dominated_era abstract "In physical cosmology, the dark-energy-dominated era refers to the last of the three phases of the known universe, the other two being the matter-dominated era and the radiation-dominated era. The dark-energy-dominated era began after the matter-dominated era, i.e. when the Universe was about 5 billion years old. As other forms of the matter – dust and radiation – dropped to very low concentrations, the cosmological constant term started to dominate the energy density of the Universe.For a dark-energy-dominated universe, the evolution of the scale factor in the Friedmann–Lemaître–Robertson–Walker metric is easily obtained solving the Friedmann equations:Here, the coefficient H in the exponential, the Hubble constant, isThis exponential dependence on time makes the spacetime geometry identical to the de Sitter Universe, and only holds for a positive sign of the cosmological constant, the sign that was observed to be realized in Nature anyway.The current density of the observable universe is of the order of 9.44 x 10−27kg m−3 and the age of the universe is of the order of 13.8 billion years, or 4.358 x 1017s. The Hubble parameter, H, is ~70.88 km s−1Mpc−1. (The Hubble time is 13.79 billion years.) The value of the cosmological constant, Λ, is ~2 x 10−35s−2.".
- Dark-energy-dominated_era wikiPageID "19683237".
- Dark-energy-dominated_era wikiPageRevisionID "575541405".
- Dark-energy-dominated_era hasPhotoCollection Dark-energy-dominated_era.
- Dark-energy-dominated_era subject Category:Physical_cosmology.
- Dark-energy-dominated_era comment "In physical cosmology, the dark-energy-dominated era refers to the last of the three phases of the known universe, the other two being the matter-dominated era and the radiation-dominated era. The dark-energy-dominated era began after the matter-dominated era, i.e. when the Universe was about 5 billion years old.".
- Dark-energy-dominated_era label "Dark-energy-dominated era".
- Dark-energy-dominated_era sameAs m.04n102m.
- Dark-energy-dominated_era sameAs Q5223090.
- Dark-energy-dominated_era sameAs Q5223090.
- Dark-energy-dominated_era wasDerivedFrom Dark-energy-dominated_era?oldid=575541405.
- Dark-energy-dominated_era isPrimaryTopicOf Dark-energy-dominated_era.