Big-bang model | Definition, Evidence, Videos, & Facts | Britannica
2024年11月25日 · 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.
Big Bang - Wikipedia
Various cosmological models of the Big Bang explain the evolution of the observable universe from the earliest known periods through its subsequent large-scale form. [6][7][8] These models offer a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background (CMB) ra...
Alternatives to the Big Bang Theory (infographic) | Space
2022年3月8日 · The Big Bang Theory is the primary explanation for how the universe began 13.8 billion years ago. Though it is the leading explanation, some theorists have come up with alternative ideas or...
The history of the universe: Big Bang to now in 10 easy steps - Space.com
2022年2月2日 · The history of the universe and how it evolved is broadly accepted as the Big Bang model, which states that the universe began as an incredibly hot, dense point roughly 13.7 billion years...
What is the Big Bang Theory? | Space
2023年7月26日 · 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.
What happened in the early universe? | Center for Astrophysics ...
The Big Bang theory of cosmology successfully describes the 13.7 billion years of evolutionary history of our Universe. However, it is known that the current Big Bang theory cannot self-consistently explain its initial conditions. We are interested in finding out what caused the Big Bang, and the physics involved in this primordial epoch.
History of the Big Bang theory - Wikipedia
In 1927, the Belgian physicist Georges Lemaitre proposed an expanding model for the universe to explain the observed redshifts of spiral nebulae, and calculated the Hubble law. He based his theory on the work of Einstein and De Sitter, and independently derived Friedmann's equations for an expanding universe.
The Big Bang - NASA Science
Study how the universe evolved, learn about the fundamental forces , and discover what the cosmos is made of. The origin, evolution, and nature of the universe have fascinated and confounded humankind for centuries.
Big Bang - Science@NASA
The big bang theory of the universe starts with a single point which rapidly expanded and slowly evolved into the cosmos we see today. Some 13.8 billion years ago, the universe was a dense, tremendously hot (too hot for the existence of atoms), extremely tiny point that rapidly surged outward in all directions.
The origins of the universe facts and information - National …
2024年8月16日 · NASA's James Webb Space Telescope (JWST) captured this image of the iconic Pillars of Creation, a small region filled with newly formed stars within the vast Eagle Nebula about 6,500 light-years...