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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 and ...
- Infographic
The Big Bang Theory is the primary explanation for how the...
- Planck Satellite
This graphic illustrates the evolution of satellites...
- Killed The Pigeons
Called the cosmic microwave background, it is a signature of...
- Cosmic Anniversary
The landmark find put the Big Bang theory on solid ground,...
- Did
That's what happened in a recent episode of the hit...
- Soyuz Spacecraft
The Soyuz is a type of spacecraft that the Soviet Union, and...
- Multiverse
"That is simply not true," Davies said, because to get a...
- Mike Massimino
Veteran NASA astronaut Mike Massimino (right) poses for a...
- Infographic
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.
Nov 23, 2015 · Burn that sentence into your brain. Say it before you go to sleep, and first thing when you wake up. The Big Bang theory is a model of the history of the universe, tracing the evolution of the ...
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. Although this type of universe was proposed by Russian mathematician Aleksandr Friedmann and Belgian ...
- The Editors of Encyclopaedia Britannica
- Timeline of The Big Bang Theory
- Singularity Epoch
- Inflation Epoch
- Cooling Epoch
- Structure Epoch
- Long-Term Predictions For The Future of The Universe
- History of The Big Bang Theory
- More Resources on The Big Bang Theory
Working backwards from the current state of the Universe, scientists have theorized that it must have originated at a single point of infinite density and finite time that began to expand. After the initial expansion, the theory maintains that Universe cooled sufficiently to allow the formation of subatomic particles, and later simple atoms. Giant ...
Also known as the Planck Epoch(or Planck Era), this was the earliest known period of the Universe. At this time, all matter was condensed on a single point of infinite density and extreme heat. During this period, it is believed that the quantum effects of gravity dominated physical interactions and that no other physical forces were of equal stren...
With the creation of the first fundamental forces of the universe, the Inflation Epoch began, lasting from 10-32 seconds in Planck time to an unknown point. Most cosmological models suggest that the Universe at this point was filled homogeneously with a high-energy density, and that the incredibly high temperatures and pressure gave rise to rapid e...
As the universe continued to decrease in density and temperature, the energy of each particle began to decrease and phase transitions continued until the fundamental forces of physics and elementary particles changed into their present form. Since particle energies would have dropped to values that can be obtained by particle physics experiments, t...
Over the course of the several billion years that followed, the slightly denser regions of the almost uniformly distributed matter of the Universe began to become gravitationally attracted to each other. They therefore grew even denser, forming gas clouds, stars, galaxies, and the other astronomical structures that we regularly observe today. This ...
Hypothesizing that the Universe had a starting point naturally gives rise to questions about a possible end point. If the Universe began as a tiny point of infinite density that started to expand, does that mean it will continue to expand indefinitely? Or will it one day run out of expansive force, and begin retreating inward until all matter crunc...
The earliest indications of the Big Bang occurred as a result of deep-space observations conducted in the early 20th century. In 1912, American astronomer Vesto Slipher conducted a series of observations of spiral galaxies (which were believed to be nebulae) and measured their Doppler Redshift. In almost all cases, the spiral galaxies were observed...
We have many interesting articles about the Big Bang here at Universe Today. For instance, here is What is the Evidence of the Big Bang?, What Came Before the Big Bang?, A New Theory About Of The Universe’s Creation, and What is Cosmic Background Radiation? For more information, check out NASA’s page on the Big Bang Theory. NASA’s WMAP mission webp...
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2 days ago · 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.
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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.
