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. [1] The notion of an expanding universe was first scientifically originated by physicist Alexander Friedmann in 1922 with the mathematical derivation of the Friedmann equations.
Was the Big Bang Actually an Explosion? | Britannica
The common name has allowed for the beginnings of our universe to be too often depicted as a massive explosion similar to that of an epic supernova. But was our universe really formed in a cosmic fireworks show?
The Big Bang Is Beyond Doubt. An Expert Reveals Why.
4 days ago · Over the last century or so, science has homed in on an answer: the Big Bang. This describes how the Universe was born in a cataclysmic explosion almost 14 billion years ago. In a tiny fraction of a second, the observable universe grew by the equivalent of a bacterium expanding to the size of the Milky Way.
What is the Big Bang Theory? | Space
Jul 26, 2023 · Although the Big Bang is often described as an "explosion", that's a misleading image. In an explosion, fragments are flung out from a central point into a pre-existing space.
The Big Bang - NASA Science
Overview. The origin, evolution, and nature of the universe have fascinated and confounded humankind for centuries. New ideas and major discoveries made during the 20th century transformed cosmology – the term for the way we conceptualize and study the universe – although much remains unknown. Learn more.
What Triggered the Big Bang? It's Complicated (Op-Ed) - Space.com
Nov 23, 2015 · The 1st few seconds of the Big Bang: What we know and what we don't 5 failed alternatives to the Big Bang theory and why they didn't work
Big-bang model | Definition, Evidence, Videos, & Facts | Britannica
Oct 21, 2024 · Big-bang model, widely held theory of the evolution of the universe. Its essential feature is the emergence of the universe from a state of extremely high temperature and density—the so-called big bang that occurred 13.8 billion years ago. Learn more about the big-bang model in this article.
The history of the universe: Big Bang to now in 10 easy steps - Space.com
Feb 2, 2022 · The Big Bang was not an explosion in space, as the theory's name might suggest. Instead, it was the appearance of space everywhere in the universe, researchers have said. According to the Big...
How did the Big Bang get its name? Here’s the real story - Nature
Mar 25, 2024 · The first cosmological theory of the Big Bang type dates back to 1931, when Belgian physicist and Catholic priest Georges Lemaître proposed a model based on the radioactive explosion of what...
Origins: CERN: Ideas: The Big Bang - Exploratorium
This extremely dense point exploded with unimaginable force, creating matter and propelling it outward to make the billions of galaxies of our vast universe. Astrophysicists dubbed this titanic explosion the Big Bang. The Big Bang was like no explosion you might witness on earth today.