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

Princeton's WordNetRate this definition:0.0 / 0 votes

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

WikipediaRate this definition:0.0 / 0 votes

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.

Matched Categories

1. • Cosmology
   • Scientific Theory

How to pronounce big-bang theory?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say big-bang theory in sign language?

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. Chuck Lorre:

   We were reading articles about how kids here and in England were gravitating to STEM fields, both in high school and college, because they’d been impacted by the show, ‘The Big Bang Theory’ actually caused them to look into science and technology and math as career goals. You don’t set out to make a sitcom anticipating you might cause somebody to change their life.

3. Kunal Nayyar:

   Look, next season, as it stands on our contract, could be the last season of 'Big Bang Theory,' to be completely honest … I know people are going to want to know what happens after season 10. I don’t know what’s going to happen.

4. Mayim Bialik:

   Being part of ‘ The Big Bang Theory ’ for gosh, almost a decade of my life, was a thrill, it was a real thrill as an actor to be employed for that long and to be employed at something that I enjoyed so much with people that I enjoyed working with so much. As a neuroscientist in real life, I really enjoyed going to a job where our intellect is appreciated and our characters ’ intellects were appreciated.

5. 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.

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=big-bang theory
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Big-Bang_Theory