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  2. Cyclic model - Wikipedia

    en.wikipedia.org/wiki/Cyclic_model

    A cyclic model (or oscillating model) is any of several cosmological models in which the universe follows infinite, or indefinite, self-sustaining cycles. For example, the oscillating universe theory briefly considered by Albert Einstein in 1930 theorized a universe following an eternal series of oscillations, each beginning with a Big Bang and ending with a Big Crunch; in the interim, the ...

  3. Cyclical theory (United States history) - Wikipedia

    en.wikipedia.org/wiki/Cyclical_theory_(United...

    The cyclical theory refers to a model used by historians Arthur M. Schlesinger Sr. and Arthur M. Schlesinger Jr. to explain the fluctuations in politics throughout American history. [1] [2] In this theory, the United States's national mood alternates between liberalism and conservatism. Each phase has characteristic features, and each phase is ...

  4. Timeline of cosmological theories - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_cosmological...

    This timeline of cosmological theories and discoveries is a chronological record of the development of humanity's understanding of the cosmos over the last two-plus millennia. Modern cosmological ideas follow the development of the scientific discipline of physical cosmology .

  5. Chronology of the universe - Wikipedia

    en.wikipedia.org/wiki/Chronology_of_the_universe

    This is equivalent to a linear increase of at least 10 26 times in every spatial dimension—equivalent to an object 1 nanometre (10 −9 m, about half the width of a molecule of DNA) in length, expanding to one approximately 10.6 light-years (100 trillion kilometres) long in a tiny fraction of a second.

  6. Decomposition of time series - Wikipedia

    en.wikipedia.org/wiki/Decomposition_of_time_series

    A trend exists when there is a persistent increasing or decreasing direction in the data. The trend component does not have to be linear. [1], the cyclical component at time t, which reflects repeated but non-periodic fluctuations. The duration of these fluctuations depend on the nature of the time series.

  7. Cyclical history - Wikipedia

    en.wikipedia.org/wiki/Cyclical_history

    Cyclic history or Cyclical history may refer to: Social cycle theory; Cycle of yugas, ages or stages This page was last edited on 26 November 2020, at 13:01 (UTC). ...

  8. Conformal cyclic cosmology - Wikipedia

    en.wikipedia.org/wiki/Conformal_cyclic_cosmology

    Conformal cyclic cosmology (CCC) is a cosmological model in the framework of general relativity and proposed by theoretical physicist Roger Penrose. [1] [2] [3] In CCC, the universe iterates through infinite cycles, with the future timelike infinity (i.e. the latest end of any possible timescale evaluated for any point in space) of each previous iteration being identified with the Big Bang ...

  9. Wheel of time - Wikipedia

    en.wikipedia.org/wiki/Wheel_of_time

    The Bakongo Cosmogram. In traditional Bakongo religion, the four elements are incorporated into the Kongo cosmogram.This sacred wheel depicts the physical world (Nseke), the spiritual world of the ancestors (Mpémba), the Kalûnga line that runs between the two worlds, the sacred river (mbûngi) that began as a circular void and forms a circle around the two worlds, and the path of the sun.