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Jul 26, 2023 · The Big Bang Theory is the leading explanation for how the universe began. Simply put, it says the universe as we know it started with an infinitely hot and dense single point that inflated...
The big-bang model is the widely accepted theory of the origin and evolution of the universe from a hot and dense state 13.8 billion years ago. Learn about its assumptions, predictions, observations, and challenges from Britannica's experts.
- The Editors of Encyclopaedia Britannica
The Big Bang is a physical theory that describes how the universe expanded from a primordial state of high density and temperature. It was first proposed as a physical theory in 1931 by Roman Catholic priest and physicist Georges Lemaître when he suggested the universe emerged from a "primeval atom".
Learn how the universe evolved from the Big Bang to the present day, and explore the fundamental forces and cosmic matter. Discover the latest discoveries and stories from NASA's cosmology research and missions.
May 6, 2024 · 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!
Dec 18, 2023 · Learn how astronomers discovered the Big Bang and what happened after the explosion. Explore the evidence, the cosmic background radiation, the dark ages, and the fate of the universe.
Jun 12, 2019 · By Charlie Wood. published 12 June 2019. The universe began with a bang. Cosmologists have predicted that stars didn't form for another 180 million years.(Image credit: Shutterstock) The Big Bang...
