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  2. Jul 26, 2023 · The Big Bang Theory explains how the universe began with an infinitely hot and dense single point that inflated to form the ever-expanding cosmos we see today.

  3. The Big Bang - NASA Science. Explore Cosmic History. Study how the universe evolved, learn about the fundamental forces , and discover what the cosmos is made of. Overview. The origin, evolution, and nature of the universe have fascinated and confounded humankind for centuries.

  4. Oct 21, 2024 · Big-bang model, widely held theory of the evolution of the universe. Its essential feature is the emergence of the universe from a state of extremely high temperature and density—the so-called big bang that occurred 13.8 billion years ago. Learn more about the big-bang model in this article.

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  5. Oct 11, 2024 · What Is the Big Bang? The Short Answer: The big bang is how astronomers explain the way the universe began. It is the idea that the universe began as just a single point, then expanded and stretched to grow as large as it is right now—and it is still stretching!

    • What does the Big Bang theory tell us about the universe?1
    • What does the Big Bang theory tell us about the universe?2
    • What does the Big Bang theory tell us about the universe?3
    • What does the Big Bang theory tell us about the universe?4
    • What does the Big Bang theory tell us about the universe?5
  6. en.wikipedia.org › wiki › Big_BangBig Bang - Wikipedia

    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. The Big Bang Theory is a scientific definition that gives us an explanation of the origin and evolution of the universe. It aims to provide an explanation for the fundamental nature of the cosmos, including the formation of galaxies, the distribution of matter, and the expansion of space itself.

  8. 1 day ago · It’s a question that humans have pondered for thousands of years. Over the last century or so, science has homed in on an answer: the Big Bang. This describes how the Universe was born in a ...

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