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- Flatness_problem abstract "The flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe. Such problems arise from the observation that some of the initial conditions of the universe appear to be fine-tuned to very 'special' values, and that a small deviation from these values would have had massive effects on the nature of the universe at the current time.In the case of the flatness problem, the parameter which appears fine-tuned is the density of matter and energy in the universe. This value affects the curvature of space-time, with a very specific critical value being required for a flat universe. The current density of the universe is observed to be very close to this critical value. Since the total density departs rapidly from the critical value over cosmic time, the early universe must have had a density even closer to the critical density, departing from it by one part in 1062 or less. This leads cosmologists to question how the initial density came to be so closely fine-tuned to this 'special' value.The problem was first mentioned by Robert Dicke in 1969. The most commonly accepted solution among cosmologists is cosmic inflation, the idea that the universe went through a brief period of extremely rapid expansion in the first fraction of a second after the Big Bang; along with the monopole problem and the horizon problem, the flatness problem is one of the three primary motivations for inflationary theory.".
- Flatness_problem thumbnail End_of_universe.jpg?width=300.
- Flatness_problem wikiPageID "1118171".
- Flatness_problem wikiPageRevisionID "604664202".
- Flatness_problem hasPhotoCollection Flatness_problem.
- Flatness_problem subject Category:Inflation_(cosmology).
- Flatness_problem subject Category:Physical_cosmology.
- Flatness_problem comment "The flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe.".
- Flatness_problem label "Flatness problem".
- Flatness_problem label "Problem płaskości".
- Flatness_problem label "Problème de la platitude".
- Flatness_problem label "Vlak heelal".
- Flatness_problem label "平坦性問題".
- Flatness_problem sameAs Problème_de_la_platitude.
- Flatness_problem sameAs 平坦性問題.
- Flatness_problem sameAs Vlak_heelal.
- Flatness_problem sameAs Problem_płaskości.
- Flatness_problem sameAs m.047lj4.
- Flatness_problem sameAs Q2078326.
- Flatness_problem sameAs Q2078326.
- Flatness_problem wasDerivedFrom Flatness_problem?oldid=604664202.
- Flatness_problem depiction End_of_universe.jpg.
- Flatness_problem isPrimaryTopicOf Flatness_problem.