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The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. [1] It was first proposed in 1927 by Roman Catholic priest and physicist Georges Lemaître.
Apr 11, 2024 · 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!
Jul 26, 2023 · The name "Big Bang Theory" has been a popular way to talk about the concept among astrophysicists for decades, but it hit the mainstream in 2007 when a comedy T.V. show with the same name ...
Mar 1, 2024 · The big-bang model is a widely accepted theory of the origin and evolution of the universe from a hot and dense state 13.8 billion years ago. Learn about the assumptions, predictions, and observations that support this theory, as well as its history and alternative cosmologies.
- The Editors of Encyclopaedia Britannica
Learn how the universe evolved from the Big Bang, the origin of all matter and energy, and what it is made of. Discover the latest discoveries and stories about dark energy, dark matter, galaxies, stars, black holes, and more.
Jul 1, 2019 · Learn about the scientific evidence and theory of the Big Bang, the origin of the universe. Explore the key eras and events from the first fraction of a second to the formation of galaxies and stars.
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Sep 30, 2022 · Learn about the big bang, the event that created the universe 13.8 billion years ago. Find out how astronomers measure the expansion rate of the universe and what it reveals about its age and history.
