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1. www.britannica.com › science › big-bang-modelBig-bang model | Definition, Evidence, Videos, & Facts

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   Jul 29, 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.

   • Expanding Universe

     Einstein, the big bang, and the expansion of the universe....

2. Videos

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     0:59

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     The Big Bang Theory 12x07 Sneak Peek #2 "The Grant Allocation Derivation" (HD)

     30 Oct 2018

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     0:38

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     The Big Bang Theory 12x07 Sneak Peek "The Grant Allocation Derivation" (HD)

     30 Oct 2018

     56.6K views

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     19:14

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     The Big Bang Theory: Season 12 Episode 7 The Grant Allocation Derivation

     2 Sep 2023

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3. en.wikipedia.org › wiki › Hubble's_lawHubble's law - Wikipedia

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   2 days ago · Hubble's law is considered the first observational basis for the expansion of the universe, and today it serves as one of the pieces of evidence most often cited in support of the Big Bang model. [3] [4] The motion of astronomical objects due solely to this expansion is known as the Hubble flow. [5]

4. en.wikipedia.org › wiki › Cosmic_microwave_backgroundCosmic microwave background - Wikipedia

   en.wikipedia.org › wiki › Cosmic_microwave_background

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   2 days ago · Two of the greatest successes of the Big Bang theory are its prediction of the almost perfect black body spectrum and its detailed prediction of the anisotropies in the cosmic microwave background. The CMB spectrum has become the most precisely measured black body spectrum in nature.

5. en.wikipedia.org › wiki › Chronology_of_the_universeChronology of the universe - Wikipedia

   en.wikipedia.org › wiki › Chronology_of_the_universe

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   2 days ago · Overview. Chronology in five stages. Diagram of evolution of the (observable part) of the universe from the Big Bang (left), the CMB -reference afterglow, to the present. For the purposes of this summary, it is convenient to divide the chronology of the universe since it originated, into five parts.

6. www.looper.com › 1617020 › the-big-bang-theory-139The Big Bang Theory: Why The 139½ Hours Time Jump ... - Looper

   www.looper.com › 1617020 › the-big-bang-theory-139

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   Jul 14, 2024 · The 139½ hours time jump in the two-part "The Big Bang Theory" finale has a secret meaning only hardcore fans of the series know. Here's what it really means.

7. www.britannica.com › science › cosmic-microwaveCosmic microwave background | Electromagnetic Radiation & Big ...

   www.britannica.com › science › cosmic-microwave

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   Jul 16, 2024 · cosmic microwave background (CMB), electromagnetic radiation filling the universe that is a residual effect of the big bang 13.8 billion years ago. Because the expanding universe has cooled since this primordial explosion, the background radiation is in the microwave region of the electromagnetic spectrum .

8. People also ask

   What is a Big Bang model?

   • They write new content and verify and edit content received from contributors. 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.

   Big-bang model | Definition, Evidence, Videos, & Facts

   www.britannica.com/science/big-bang-model

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   How did the Big Bang theory change the universe?

   • According to the big-bang model, the universe expanded rapidly from a highly compressed primordial state, which resulted in a significant decrease in density and temperature. Soon afterward, the dominance of matter over antimatter (as observed today) may have been established by processes that also predict proton decay.

   Big-bang model | Definition, Evidence, Videos, & Facts

   www.britannica.com/science/big-bang-model

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   How did astronomers explain 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's This Big Bang All About? In 1927, an astronomer named Georges Lemaître had a big idea.

   What Is the Big Bang? | NASA Space Place – NASA Science for Kids

   spaceplace.nasa.gov/big-bang/en/

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   Why is CDM a good model for the Big Bang?

   • The high degree of uniformity throughout the observable universe and its faint but measured anisotropy lend strong support for the Big Bang model in general and the ΛCDM ("Lambda Cold Dark Matter") model in particular. Moreover, the fluctuations are coherent on angular scales that are larger than the apparent cosmological horizon at recombination.

   Cosmic microwave background - Wikipedia

   en.wikipedia.org/wiki/Cosmic_microwave_background

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9. spaceplace.nasa.gov › big-bang › enWhat Is the Big Bang? - NASA Space Place

   spaceplace.nasa.gov › big-bang › en

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   6 days ago · 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!