What does big-bang theory mean?

Definitions for big-bang theory
big-bang the·o·ry

This dictionary definitions page includes all the possible meanings, example usage and translations of the word big-bang theory.

Princeton's WordNet

  1. big-bang theory, big bang theorynoun

    (cosmology) the theory that the universe originated sometime between 10 billion and 20 billion years ago from the cataclysmic explosion of a small volume of matter at extremely high density and temperature

Wikipedia

  1. big-bang theory

    The Big Bang event is a physical theory that describes how the universe expanded from an initial state of high density and temperature. Various cosmological models of the Big Bang explain the evolution of the observable universe from the earliest known periods through its subsequent large-scale form. These models offer a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background (CMB) radiation, and large-scale structure. The overall uniformity of the Universe, known as the flatness problem, is explained through cosmic inflation: a sudden and very rapid expansion of space during the earliest moments. However, physics currently lacks a widely accepted theory of quantum gravity that can successfully model the earliest conditions of the Big Bang. Crucially, these models are compatible with the Hubble–Lemaître law—the observation that the farther away a galaxy is, the faster it is moving away from Earth. Extrapolating this cosmic expansion backwards in time using the known laws of physics, the models describe an increasingly concentrated cosmos preceded by a singularity in which space and time lose meaning (typically named "the Big Bang singularity"). In 1964 the CMB was discovered, which convinced many cosmologists that the competing steady-state model of cosmic evolution was falsified, since the Big Bang models predict a uniform background radiation caused by high temperatures and densities in the distant past. A wide range of empirical evidence strongly favors the Big Bang event, which is now essentially universally accepted. Detailed measurements of the expansion rate of the universe place the Big Bang singularity at an estimated 13.787±0.020 billion years ago, which is considered the age of the universe.There remain aspects of the observed universe that are not yet adequately explained by the Big Bang models. After its initial expansion, the universe cooled sufficiently to allow the formation of subatomic particles, and later atoms. The unequal abundances of matter and antimatter that allowed this to occur is an unexplained effect known as baryon asymmetry. These primordial elements—mostly hydrogen, with some helium and lithium—later coalesced through gravity, forming early stars and galaxies. Astronomers observe the gravitational effects of an unknown dark matter surrounding galaxies. Most of the gravitational potential in the universe seems to be in this form, and the Big Bang models and various observations indicate that this excess gravitational potential is not created by baryonic matter, such as normal atoms. Measurements of the redshifts of supernovae indicate that the expansion of the universe is accelerating, an observation attributed to an unexplained phenomenon known as dark energy.

ChatGPT

  1. big-bang theory

    The Big Bang Theory is a scientific explanation about how the universe began. It proposes that about 13.8 billion years ago, all the matter and energy in the universe was concentrated in an extremely tiny point, which then began rapidly expanding in a hot explosion. This event marked the birth of the universe as we know it today. The theory is widely accepted among scientists based on a broad range of observational evidence.

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Numerology

  1. Chaldean Numerology

    The numerical value of big-bang theory in Chaldean Numerology is: 5

  2. Pythagorean Numerology

    The numerical value of big-bang theory in Pythagorean Numerology is: 7

Examples of big-bang theory in a Sentence

  1. Johnny Galecki:

    One of the most rewarding elements of being on 'The Big Bang Theory' has been being approached by younger people who claim they never before had considered a life in the sciences until watching the show. Our goal on 'Big Bang‘ is to make people laugh. These kids are molding our culture, building our future and even curing diseases. 'SciJinks' is a way to celebrate them and hopefully inspire more young people to follow in their footsteps — while having an absurdly good and mischievous time.

  2. Erica Lynn Rosenthal:

    ( The Big Bang Theory) featured a fairly diverse cast of characters, including an immigrant and numerous female scientists, but rarely explicitly addressed social issues, which can be alienating to Reds.

  3. Cynthia Littleton:

    Surprising to not see 'Empire' breakthrough in drama after making such a splash, very surprising to see 'Big Bang Theory' not in the race for comedy series and 'Good Wife' not in the race for drama, big Bang Theory.

  4. Kaley Cuoco:

    To see that be the pinnacle of this season was really cool, we’ve all come such a long way. ‘ THE BIG BANG THEORY ’ FINALE RECAP : SHELDON AND AMY STRUGGLE WITH LONG DISTANCE AND TEMPTATION That was n’t the only behind-the-scenes moment that the cast shared with the Comic Con crowd. According to Entertainment Weekly, Kaley Cuoco and Galecki revealed the circumstances surrounding an on-set injury from a prank gone awry. In an effort to shock the cast and crew during a scene in which the two characters were fighting, Galecki jokingly pretended to punch his co-star in the face. However, the actress' head accidentally caught a chair while she was falling and the end result was stitches in her eye brow. ‘ THE BIG BANG THEORY ’ ACTRESS MAYIM BIALIK RECEIVES ‘ DOOGIE HOWSER ’ ROYALTY CHECK FOR TWO CENTS.

  5. Chuck Lorre:

    We have all been given a gift with ‘The Big Bang Theory,’ a show that’s not only based in the scientific community, but also enthusiastically supported by that same community — this is our opportunity to give back, in that spirit, our ‘Big Bang’ family has made a meaningful contribution, and together, we’ll share in the support of these future scholars, scientists and leaders.

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"big-bang theory." Definitions.net. STANDS4 LLC, 2024. Web. 24 Apr. 2024. <https://www.definitions.net/definition/big-bang+theory>.

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