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The discovery and confirmation of the CMB in 1964 secured the Big Bang as the best theory of the origin and evolution of the universe.
Jul 26, 2023 · The Big Bang Theory explains how the universe began with an infinitely hot and dense single point that inflated to form the ever-expanding cosmos we see today.
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
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.
Jan 18, 2017 · Learn how the big bang theory describes the cosmic cataclysm that created the universe from a single primordial atom. Explore the key events and discoveries that support this theory, from inflation to cosmic microwave background radiation.
