Big Bang Theory

ScientificConcept

The prevailing cosmological model explaining the origin of the universe from a hot, dense state. Alex Filippenko asserts that recent JWST findings do not disprove this theory.


First Mentioned

9/30/2025, 4:41:28 AM

Last Updated

9/30/2025, 4:43:28 AM

Research Retrieved

9/30/2025, 4:43:28 AM

Summary

The Big Bang Theory is the most widely accepted cosmological model describing the origin and evolution of the universe. It posits that the universe began from an extremely hot, dense, and infinitely small point approximately 13.7 billion years ago, and has been continuously expanding and cooling ever since. This robust physical theory is supported by a wealth of observational evidence, including the cosmic microwave background radiation, the redshift of galaxies (Hubble's Law), and the abundance of light elements. It provides a framework for understanding the formation of matter, stars, galaxies, and the large-scale structure of the cosmos. While widely supported, some alternative ideas like eternal inflation or a cyclical universe exist. It is distinct from the popular American television sitcom of the same name.

Referenced in 1 Document
Research Data
Extracted Attributes
  • Type

    Cosmological Model

  • Field

    Cosmology, Physics

  • Status

    Most widely accepted explanation for the origin of the universe

  • Proposer

    Georges Lemaître

  • Description

    Explains how the universe expanded from an initial state of high density and temperature.

  • Proposed Date

    1927

  • Primary Evidence

    Large-scale structure of the universe

  • Estimated Age of Universe

    13.7 billion years

Timeline
  • Georges Lemaître formalized the Big Bang theory. (Source: Web search results)

    1927-XX-XX

  • Edwin Hubble's observations of galactic redshift provided foundational support for the theory (Hubble's Law). (Source: Web search results)

    1929-XX-XX

  • The Cosmic Microwave Background Radiation (CMB) was discovered, providing strong evidence for the theory. (Source: Web search results)

    1964-XX-XX

  • The COBE satellite measured the black-body spectrum of the CMB with high accuracy. (Source: Web search results)

    1990-XX-XX

  • The James Webb Space Telescope launched, providing unprecedented views of the early universe and reaffirming the theory's robustness through its observations. (Source: Related documents)

    2021-12-25

The Big Bang Theory

The Big Bang Theory is an American television sitcom created by Chuck Lorre and Bill Prady for CBS. It aired from September 24, 2007, to May 16, 2019, running for 12 seasons and 279 episodes. The show originally centered on five characters living in Pasadena, California: Leonard Hofstadter (Johnny Galecki) and Sheldon Cooper (Jim Parsons), both physicists at Caltech, who share an apartment; Penny (Kaley Cuoco), a waitress and aspiring actress who lives across the hall; and Leonard and Sheldon's similarly geeky and socially awkward friends and coworkers, aerospace engineer Howard Wolowitz (Simon Helberg) and astrophysicist Raj Koothrappali (Kunal Nayyar). Over time, supporting characters were promoted to starring roles, including neuroscientist Amy Farrah Fowler (Mayim Bialik), microbiologist Bernadette Rostenkowski (Melissa Rauch), and comic book store owner Stuart Bloom (Kevin Sussman). The show was filmed in front of a live audience and produced by Chuck Lorre Productions, with Warner Bros. Television handling distribution. It received mixed reviews throughout its first season, but reception was more favorable in the second and third seasons. Despite early mixed reviews, seven seasons were ranked within the top ten of the final season ratings, and it ultimately reached the No. 1 spot in its eleventh season. It was nominated for the Emmy Award for Outstanding Comedy Series from 2011 to 2014 and won the Emmy Award for Outstanding Lead Actor in a Comedy Series four times for Parsons, totaling seven Emmy Awards from 46 nominations. Parsons also won the Golden Globe for Best Actor in a Television Comedy Series in 2011. The series' success launched a multimedia franchise. A prequel series based on Parsons' character Sheldon Cooper, Young Sheldon, aired from 2017 to 2024, with Parsons as the narrating adult Sheldon. The third series in the franchise, a sequel series to Young Sheldon titled Georgie & Mandy's First Marriage, premiered in October 2024 and follows Sheldon's older brother, Georgie, and his wife, Mandy. A fourth series, following Stuart, his girlfriend Denise, and geologist Bert Kibbler, is in development for HBO Max.

Web Search Results
  • Big Bang - Wikipedia

    The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. Various cosmological models based on the Big Bang concept explain a broad range of phenomena, including the abundance of light elements, the cosmic microwave background (CMB) radiation, and large-scale structure. The uniformity of the universe, known as the horizon and flatness problems, is explained through cosmic inflation: a phase of accelerated expansion during [...] The Big Bang models offer a comprehensive explanation for a broad range of observed phenomena, including the abundances of the light elements, the cosmic microwave background, large-scale structure, and Hubble's law. The earliest and most direct observational evidence of the validity of the theory are the expansion of the universe according to Hubble's law (as indicated by the redshifts of galaxies), discovery and measurement of the cosmic microwave background and the relative abundances of [...] This article is about the theory. For the television series, see The Big Bang Theory. For other uses, see Big Bang (disambiguation) "Big Bang (disambiguation)") and Big Bang Theory (disambiguation) "Big Bang Theory (disambiguation)"). | |

  • What is the Big Bang Theory? | Space

    The Big Bang Theory stands as the most widely accepted explanation for the origin of the universe. According to this theory, the universe began as an infinitely small, hot, and dense point, which rapidly expanded and continued to stretch over 13.7 billion years. This initial period of rapid inflation set the stage for the vast and still-growing cosmos we observe today. [...] Running for 279 episodes over 12 seasons, the show "The Big Bang Theory" followed the lives of a group of scientists, which included physicists, astrophysicists and aerospace engineers. The show explores the group's nerdy friendships, romances and squabbles. Its first season premiered on Sept. 24, 2007, and the show officially ended on May 16, 2019. [...] Although astronomers cannot directly witness the universe's formation, much of what we know about the Big Bang Theory comes from advanced mathematical models and simulations. Evidence supporting this theory includes the cosmic microwave background, a faint "echo" of the universe's early expansion that scientists can study in detail. While the Big Bang Theory is widely supported within the scientific community, some researchers propose alternative ideas, such as eternal inflation or a cyclical,

  • History of the Big Bang theory

    bang prediction is the black-body spectrum of the CMB, which was not measured with high accuracy until COBE in 1990). After some reformulation, the Big Bang has been regarded as the best theory of the origin and evolution of the cosmos. Before the late 1960s, many cosmologists thought the infinitely dense and physically paradoxical singularity at the starting time of Friedmann's cosmological model could be avoided by allowing for a universe which was contracting before entering the hot dense [...] The history of the Big Bang theory began with the Big Bang's development from observations and theoretical considerations. Much of the theoretical work in cosmology now involves extensions and refinements to the basic Big Bang model. The theory itself was originally formalised by Father Georges Lemaître in 1927. Hubble's law of the expansion of the universe provided foundational support for the theory. ## Philosophy and medieval temporal finitism [edit]

  • Evidence for the Big Bang

    fact sheet Evidence for the Big Bang ast0959 | Evolution of the Universe 3: Evidence for the Big Bang (fact sheet) developed for the Department of Education WA © The University of Western Australia 2014 for conditions of use see spice.wa.edu.au/usage version 1.0 page 1 Licensed for NEALS The Big Bang theory is an explanation of the early development of the Universe. According to this theory the Universe expanded from an extremely small, extremely hot, and extremely dense state. Since then it has [...] Hubble’s discovery provided additional evidence for what was to become known as Big Bang theory, first proposed by Georges Lemaître in 1927. It was a major step forward for astronomy. Compare Hubble’s image of the Andromeda Galaxy taken in 1923 (left) with a recent image that shows much more detail for the same galaxy (right). Hubble’s photographic plate is reversed (stars appear black against a bright sky). [...] expanded and become less dense and cooler. The Big Bang is the best model used by astronomers to explain the creation of matter, space and time 13.7 billion years ago.

  • Big Bang Theory: Origin of Our Universe

    remnants of this early, hot phase can still be observed today in the form of the cosmic microwave background radiation, a faint afterglow of the Big Bang. The Big Bang theory not only explains the formation of matter and the structure of the universe but also provides a framework for understanding the origin of stars, galaxies, and the cosmic structures we observe today. It has been supported by a wealth of observational evidence, including the redshift of galaxies, the abundance of light [...] Cosmological redshift I. INTRODUCTION In 1927, an astronomer named Georges Lemaitre had a big idea. He said that a very long time ago, the universe started as just a single point. He said the universe stretched and expanded to get as big as it is now, and that it could keep on stretching. The Big Bang Theory is a widely accepted scientific theory about the origin of the universe. It suggests that the universe began as a single point and has been expanding ever since. The theory has been [...] together. Over lots of time, atoms came together to form stars and galaxies [1-3]. The first stars created bigger atoms and groups of atoms. That led to more stars being born. At the same time, galaxies were crashing and grouping together. As new stars were being born and dying, then things like asteroids, comets, planets, and black holes formed! The Big Bang theory is a fundamental concept in cosmology that explains the origin and evolution of the universe. It proposes that the universe began

Location Data

Big Bang Theory, Area F (Alberni Highway), Regional District of Nanaimo, British Columbia, V0R 1V0, Canada

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Coordinates: 49.2423309, -124.3579840

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