The theory that the known universe originated in an explosive event (the big bang) in which all of the matter and energy of the universe was contained in a single point and began to rapidly expand and evolve, starting as high-energy particles and radiation, and, as it cooled over time, evolving into ordinary subatomic particles, atoms, and then stars and galaxies. According to this theory, the four-dimensional space-time continuum which we perceive as our universe continues to expand to the present time, but it is unknown whether the expansion will continue indefinitely or eventually stop or even reverse, possibly leading to a contraction to a single point sometimes referred to as the "big crunch". The competing "Steady-state Theory" gradually lost favor in the 1980's and 1990's. See also big bang.
A theory that says the Universe began with a super-powerful explosion.
The widely held belief that the Universe began in a fiery explosion, 10-15 billion years ago. The cosmic microwave background, big bang nucleosynthesis, and the observed Hubble expansion of the Universe are considered proof of the big bang theory. For more on big bang cosmology, check out this primer.
The theory that the universe began with a huge explosion, and that the universe will continue to expand outward from that explosion.
A theory of cosmology in which the expansion of the universe is presumed to have begun with a primeval explosion.
A theory in which the expansion of the universe is presumed to have begun with an explosion (referred to as the "Big Bang").
The theory that the Universe burst forth during the finite past and is still expanding outward from an almost infinitely dense state.
A cosmological theory that states that the universe began many billions of years ago, with a sudden massive expansion of matter and space-time from a point of near infinite density. This theory is based on observations of the motions of objects in space, which are all moving away from one another. The theory predicts that a dim background radiation would be left over from the big bang. This radiation was in fact discovered later, thus strengthening the theory. There are still many unknowns such as: other possible forces affecting the expansion rates, the possible presence of dark matter, the exact age of the universe (15 billion appears to be somewhere in the neighborhood), and what conditions led up to the big bang.
(cosmology) the theory that the universe originated 20 billion years ago from the cataclysmic explosion of a small mass of matter at extremely high density and temperature
states that all the matter in the universe existed in a single point in space. This point exploded and the resulting temperature caused the subatomic particles to join together to form the first atoms of hydrogen and helium
The theory that the Universe 'started' with an event that created time and space, about 13 billion years ago.
The theory that the Universe 'started' with an explosive event that created time and space, between 15 and 20 thousand million years ago.
is one of the major theories used to explain the ‘birth’ of the universe. It says that around 13.7 billion years ago the whole universe (including space and time) was created as the result of a phenomenal surge of energy. And ever since, the universe has continued to expand. In 1965 the theory was given strong support when microwave radiation residue, predicted to have been created by the Big Bang, was picked up by a radio telescope in America (this was the Bell antenna, that inspired Conrad Shawcross’s sculpture, ‘Space Trumpet’).
The theory that the Universe began with all matter and energy concentrated to very high density and temperature some 15 billion years ago. The present universe expanded from that epoch and is still expanding.
Theory of the creation of the universe first introduced by George Gamow in the 1940s where the universe started as very small, dense, and hot about 15 billion years ago and then expanded into our modern day universe and continues to expand today.
A cosmological model, in which the universe was once compressed to infinite density and has been expanding ever since. Originally a term used by unbelieving scoffers, now as widely accepted as the model itself.
The theory that the universe was once clustered and at the 'beginning' it exploded out, as shown by the fact that objects are still moving out from the center.
A model for the evolution of the universe that holds that all matter and energy in the universe were concentrated in one point, which suddenly exploded. Subsequently, matter condensed to form atoms, elements, and eventually galaxies and stars.
The theory of an expanding universe that begins as an infinitely dense and hot medium. The initial instant is called the Big Bang.
The most supported explanation for the formation of the universe. All matter and energy in the universe came from a condensed hot mass that exploded and expanded in all directions.
A theory which states that the Universe began to expand after a super powerful explosion of concentrated matter and energy.
A cosmological theory holding that the universe originated approximately 20 billion years ago from the violent explosion of a very small agglomeration of matter of extremely high density and temperature.
The theory that the universe began with a violent explosion from which the expanding universe of galaxies formed.
The big bang theory states that the universe began as a tiny but powerful explosion of space-time roughly 13.7 billion years ago (plus or minus 1 percent). In 1965, Arno Penzias and Robert Wilson used a horn antenna (in Crawford Hill, N.J.) and discovered the cosmic microwave background (CMB) radiation with a temperature of 2.7 Kelvin; this CMB was left-over from the early moments of the universe after the Big Bang (this was predicted by George Gamow and Ralph Alpher, in 1948). Contrast it with the Steady-State Theory.
The theory that states that the universe began in a state of compression to infinite density, and that in one instant all matter and energy began expanding and have continued expanding ever since.
The theory that the universe came into existence at one set moment in time, between 15,000 and 20,000 million years ago.
The theory that the expanding universe began as an infinitely dense and hot medium. The initial instant is called the Big Bang. [ ] [ Close Glossary
Big Bang Theory is a musical album by Styx released in 2005.