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  2. Hartle–Hawking state - Wikipedia

    en.wikipedia.org/wiki/Hartle–Hawking_state

    The precise form of the Hartle–Hawking state is the path integral over all D-dimensional geometries that have the required induced metric on their boundary. According to the theory, time, as it is currently observed, diverged from a three-state dimension after the universe was in the age of the Planck time. [5]

  3. Borde–Guth–Vilenkin theorem - Wikipedia

    en.wikipedia.org/wiki/Borde–Guth–Vilenkin...

    He added that Alan Guth, one of the co-authors of the theorem, disagrees with Vilenkin and believes that the universe had no beginning. [ 10 ] [ 11 ] Vilenkin argues that the Carroll–Chen model constructed by Carroll and Jennie Chen, and supported by Guth, to elude the BGV theorem's conclusions persists to indicate a singularity in the ...

  4. Cosmogony - Wikipedia

    en.wikipedia.org/wiki/Cosmogony

    The Big Bang theory, which explains the Evolution of the Universe from a hot and dense state, is widely accepted by physicists.. In astronomy, cosmogony is the study of the origin of particular astrophysical objects or systems, and is most commonly used in reference to the origin of the universe, the Solar System, or the Earth–Moon system.

  5. Timeline of cosmological theories - Wikipedia

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

    c. 16th century BCE – Mesopotamian cosmology has a flat, circular Earth enclosed in a cosmic ocean. [1]c. 15th–11th century BCE – The Rigveda of Hinduism has some cosmological hymns, particularly in the late book 10, notably the Nasadiya Sukta which describes the origin of the universe, originating from the monistic Hiranyagarbha or "Golden Egg".

  6. Big Bang - Wikipedia

    en.wikipedia.org/wiki/Big_Bang

    The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. [1] The notion of an expanding universe was first scientifically originated by physicist Alexander Friedmann in 1922 with the mathematical derivation of the Friedmann equations.

  7. Cosmos - Wikipedia

    en.wikipedia.org/wiki/Cosmos

    Cosmology is a branch of metaphysics that deals with the nature of the universe, a theory or doctrine describing the natural order of the universe. [36] The basic definition of Cosmology is the science of the origin and development of the universe. In modern astronomy, the Big Bang theory is the dominant postulation.

  8. Scientific Revolution - Wikipedia

    en.wikipedia.org/wiki/Scientific_Revolution

    Lavoisier saw his theory accepted by all the most eminent men of his time, and established over a great part of Europe within a few years from its first promulgation." [ 12 ] In the 19th century, William Whewell described the revolution in science itself – the scientific method – that had taken place in the 15th–16th century.

  9. The Sleepwalkers: A History of Man's Changing Vision of the ...

    en.wikipedia.org/wiki/The_Sleepwalkers:_A_History...

    "Mechanism" is now put aside by quantum mechanics and the theory of relativity, in which the role of the observer, and therefore of the human spirit, is decisive in establishing what reality is. This is why Koestler openly contests the contemporary rejection of possible "non-causal interactions" and phenomena such as telepathy and extrasensory ...