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  2. Chronology of the universe - Wikipedia

    en.wikipedia.org/wiki/Chronology_of_the_universe

    It is not known exactly when the inflationary epoch ended, but it is thought to have been between 10 −33 and 10 −32 seconds after the Big Bang. The rapid expansion of space meant that elementary particles remaining from the grand unification epoch were now distributed very thinly across the universe. However, the huge potential energy of ...

  3. Cosmological decade - Wikipedia

    en.wikipedia.org/wiki/Cosmological_decade

    CÐ 100, the 100th cosmological decade, lasts from 10 100 to 10 101 seconds after Time Zero. CÐ is Time Zero. The epoch CÐ −43.2683 was 10 (−43.2683) seconds, which represents the Planck time since the Big Bang (Time Zero). There were an infinite number of cosmological decades between the Big Bang and the Planck epoch (or any other point ...

  4. Photon epoch - Wikipedia

    en.wikipedia.org/wiki/Photon_epoch

    In physical cosmology, the photon epoch was the period in the evolution of the early universe in which photons dominated the energy of the universe. The photon epoch started after most leptons and anti-leptons were annihilated at the end of the lepton epoch, about 10 seconds after the Big Bang. [1]

  5. Quark epoch - Wikipedia

    en.wikipedia.org/wiki/Quark_epoch

    A visual representation of the division order of universal forces. In physical cosmology, the quark epoch was the period in the evolution of the early universe when the fundamental interactions of gravitation, electromagnetism, the strong interaction and the weak interaction had taken their present forms, but the temperature of the universe was still too high to allow quarks to bind together ...

  6. Recombination (cosmology) - Wikipedia

    en.wikipedia.org/wiki/Recombination_(cosmology)

    Immediately after the Big Bang, the universe was a hot, dense plasma of photons, leptons, and quarks: the quark epoch.At 10 −6 seconds, the Universe had expanded and cooled sufficiently to allow for the formation of protons: the hadron epoch.

  7. Timeline of the early universe - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_the_early_universe

    c. 0 seconds (13.799 ± 0.021 Gya): Planck epoch begins: earliest meaningful time. Conjecture dominates discussion about the earliest moments of the universe's history. The Big Bang occurs in which ordinary space and time develop out of a primeval state (possibly a virtual particle or false vacuum) described by a quantum theory of gravity or "Theory of everything".

  8. Grand unification epoch - Wikipedia

    en.wikipedia.org/wiki/Grand_unification_epoch

    In physical cosmology, assuming that nature is described by a Grand Unified Theory, the grand unification epoch was the period in the evolution of the early universe following the Planck epoch, starting at about 10 −43 seconds after the Big Bang, in which the temperature of the universe was comparable to the characteristic temperatures of grand unified theories.

  9. Big Bang nucleosynthesis - Wikipedia

    en.wikipedia.org/wiki/Big_Bang_nucleosynthesis

    The fusion of nuclei occurred between roughly 10 seconds to 20 minutes after the Big Bang; this corresponds to the temperature range when the universe was cool enough for deuterium to survive, but hot and dense enough for fusion reactions to occur at a significant rate. [1] It was widespread, encompassing the entire observable universe.