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1. www.britannica.com › biography › Georges-LemaitreGeorges Lemaître | Big Bang Theory, Cosmology & Physics

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   5 days ago · Georges Lemaître was a Belgian astronomer and cosmologist who formulated the modern big-bang theory, which holds that the universe began in a cataclysmic explosion of a small, primeval “super-atom.” A civil engineer, Lemaître served as an artillery officer in the Belgian Army during World War I.

   • Author: The Editors of Encyclopaedia Britannica

2. Videos

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     NASA Scientific Visualization Studio | Big Bang Animation--5k Resolution

     31 Dec 2008

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     The Beginning of Everything -- The Big Bang

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     10:29

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     The Big Bang Theory Season 4: Best Scenes

     3 Oct 2010

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4. as.cornell.edu › news › simons-observatory-beginsSimons Observatory begins measurements to probe Big Bang ...

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   1 day ago · The new Simons Observatory in Chile’s Atacama Desert may soon answer the great scientific question of what happened in that tiny fraction of a second after the Big Bang. The Simons Observatory consists of a large aperture telescope and three smaller telescopes with about half a meter apertures – “very human-sized,” said Michael Niemack ...

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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   3 days ago · 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.britannica.com › science › astronomyAstronomy - Cosmology, Universe, Stars | Britannica

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   4 days ago · The currently accepted cosmological model is the big bang. In this picture, the expansion of the universe started in an intense explosion 13.8 billion years ago. In this primordial fireball, the temperature exceeded one trillion K, and most of the energy was in the form of radiation.

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

   en.wikipedia.org › wiki › Cosmic_microwave_background

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   4 days ago · In the Big Bang cosmological models, during the earliest periods, the universe was filled with an opaque fog of dense, hot plasma of sub-atomic particles. As the universe expanded, this plasma cooled to the point where protons and electrons combined to form neutral atoms of mostly hydrogen.

8. www.ladbible.com › news › scienceJames Webb Space Telescope makes discovery from ... - LADbible

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   4 days ago · Now, the telescope has found one of the essential ingredients to life shortly after the Big Bang itself some 13.8 billion years ago. That's because the JWST acts as a real-life time machine ...

9. People also ask

   What is a big bang universe?

   • (The term big bang was coined by Hoyle as a mildly pejorative characterization of the rival theory in a radio talk in 1949.) For example, in a big-bang universe, when one looks at galaxies that are far away, one also sees them as they were in the remote past (because of the travel time of the light).

   Astronomy - Steady State, Cosmology, Big Bang | Britannica

   www.britannica.com/science/astronomy/The-steady-state-challenge

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   How did the Big Bang affect cosmology?

   • In the Big Bang cosmological models, during the earliest periods, the universe was filled with an opaque fog of dense, hot plasma of sub-atomic particles. As the universe expanded, this plasma cooled to the point where protons and electrons combined to form neutral atoms of mostly hydrogen.

   Cosmic microwave background - Wikipedia

   en.wikipedia.org/wiki/Cosmic_microwave_background

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   What is the earliest meaningful time after the Big Bang?

   • To explain the observed homogeneity of the universe, the duration in these models must be longer than 10 −32 seconds. Therefore, in inflationary cosmology, the earliest meaningful time "after the Big Bang" is the time of the end of inflation. After inflation ended, the universe continued to expand, but at a decelerating rate.

   Chronology of the universe - Wikipedia

   en.wikipedia.org/wiki/Chronology_of_the_universe

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   How did the Big Bang change the temperature of the universe?

   • This event made the universe nearly transparent to radiation because light was no longer being scattered off free electrons. When this occurred some 380,000 years after the Big Bang, the temperature of the universe was about 3,000 K.

   Cosmic microwave background - Wikipedia

   en.wikipedia.org/wiki/Cosmic_microwave_background

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   Should galaxies be more densely crowded in a big-bang universe?

   • The density of galaxies in space should also diminish with time in a big-bang universe. Therefore, galaxies at great distances should be more densely crowded together than nearby galaxies are. But in a steady-state universe, the average density of galaxies should be about the same everywhere and at every time.

   Astronomy - Steady State, Cosmology, Big Bang | Britannica

   www.britannica.com/science/astronomy/The-steady-state-challenge

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   Can all elements be made in the Big Bang?

   • A key question centred on the abundances and origins of the chemical elements. In steady-state theory, it was essential that all the elements could be synthesized in stars. By contrast, in the aßγ paper, Alpher and Gamow tried to show that all the elements could be made in the big bang.

   Astronomy - Steady State, Cosmology, Big Bang | Britannica

   www.britannica.com/science/astronomy/The-steady-state-challenge

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10. www.britannica.com › science › astronomyAstronomy - Steady State, Cosmology, Big Bang | Britannica

    www.britannica.com › science › astronomy

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    4 days ago · A key question centred on the abundances and origins of the chemical elements. In steady-state theory, it was essential that all the elements could be synthesized in stars. By contrast, in the aßγ paper, Alpher and Gamow tried to show that all the elements could be made in the big bang.