The Big Bang theory developed from observations of the structure of the universe and from theoretical considerations. In 1912 Vesto Slipher measured the first Doppler shift of a spiral nebula, and soon discovered that almost all such nebulae were receding from Earth. He did not grasp the cosmological implications of this fact, and indeed at the time it was highly controversial whether or not these nebulae were "island universes" outside our Milky Way.Ten years later, Alexander Friedmann, a Russian cosmologist and mathematician, derived the Friedmann equations from Albert Einstein's equations of general relativity, showing that the universe might be expanding in contrast to the static universe model advocated by Einstein. In 1924, Edwin Hubble's measurement of the great distance to the nearest spiral nebulae showed that these systems were indeed other galaxies. Independently deriving Friedmann's equations in 1927, Georges Lemaître, a Belgian Roman Catholic priest, predicted that the recession of the nebulae was due to the expansion of the universe. In 1931 Lemaître went further and suggested that the universe began as a simple "primeval atom", echoing previous speculations about the cosmic egg origin of the universe.
Starting in 1924, Hubble painstakingly developed a series of distance indicators, the forerunner of the cosmic distance ladder, using the 100 inch Hooker telescope at Mount Wilson Observatory. This allowed him to estimate distances to galaxies whose redshifts had already been measured, mostly by Slipher. In 1929, Hubble discovered a correlation between distance and recession velocity—now known as Hubble's law. Lemaître had already shown that this was expected, given the cosmological principle.
During the 1930s other ideas were proposed as non-standard cosmologies to explain Hubble's observations, including the Milne model, the oscillatory universe (originally suggested by Friedmann, but advocated by Einstein and Richard Tolman) and Fritz Zwicky's tired light hypothesis.
After World War II, two distinct possibilities emerged. One was Fred Hoyle's steady state model, whereby new matter would be created as the universe seemed to expand. In this model, the universe is roughly the same at any point in time. The other was Lemaître's Big Bang theory, advocated and developed by George Gamow, who introduced big bang nucleosynthesis and whose associates, Ralph Alpher and Robert Herman, predicted the CMB. It is an irony that it was Hoyle who coined the name that would come to be applied to Lemaître's theory, referring to it sarcastically as "this big bang idea" during a radio broadcast. For a while, support was split between these two theories. Eventually, the observational evidence, most notably from radio source counts, began to favor the latter. The discovery of the cosmic microwave background radiation in 1964 secured the Big Bang as the best theory of the origin and evolution of the cosmos. Much of the current work in cosmology includes understanding how galaxies form in the context of the Big Bang, understanding the physics of the universe at earlier and earlier times, and reconciling observations with the basic theory.
Huge strides in Big Bang cosmology have been made since the late 1990s as a result of major advances in telescope technology as well as the analysis of copious data from satellites such as COBE, the Hubble Space Telescope and WMAP. Cosmologists now have fairly precise measurement of many of the parameters of the Big Bang model, and have made the unexpected discovery that the expansion of the universe appears to be accelerating (see dark energy).
2007-05-28 18:02:46
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answer #1
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answered by Akshitha 5
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The Big Bang theory is not a scientifically proven fact, it is a belief. If you want to believe in the big bang go ahead but do not call it science, because it definitely not. First of all the Big bang violate the 1st law of thermodynamics (Energy can neither be created nor destroyed) and the second (The entropy of an isolated system not in equilibrium will tend to increase over time, approaching a maximum value at equilibrium). Secondly, the material for the big bang must have come from somewhere, were did it come from?? And finally what ignited the big bang? The mass concentration proposed in this theory would remain forever bound as a universal black hole. Gravity would prevent it from ever expanding outward.
Clearly the Big Bang Theory is just that; a theory. It is a belief, not science and never will be, it is no different than a Christian saying God created the heavens and the Earth in Genesis. They are both beliefs, you have to accept them based on faith.
2007-05-28 17:31:31
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answer #2
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answered by JR 1
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I would give most of that a big no. The universe is not held together. It is infinite. Most galaxies are actually moving away from each other, as like an explosion - a big piece of evidence for the Big Bang theory.
2007-06-01 14:30:53
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answer #3
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answered by PseudoCognition 1
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No; not so. It is not entirely clear (at least to me) why, given the universe's total mass in a little bitty space that it did not start out (and remain) a black hole, but the evidence is that it didn't. This may relate to dark energy or dark matter, about which we know essentially nothing. But the unverse does not have a center; all points are equivalent and indistinguishable. Turbulence in the original expansion led to the formation of stars and galaxies, and some of those stars have gone nova or supernova to create the heavy elements that we see today.
Preceding answer is also correct.
2007-05-28 17:26:26
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answer #4
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answered by Anonymous
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Basically, no.
There was nothing here before the Big Bang. There was no star here. There is no black hole in the direction of the center of the Universe.
The Big Bang created a sea of energy which took thousands of years to settle down into cool enough to allow "complex" matter like protons and neutrons to form and make atomic nuclei.
I really recommend the works of John Gribben, especially In Search of the Big Bang. He is a great writer and easy for the lay reader to understand.
2007-05-28 17:08:15
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answer #5
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answered by TychaBrahe 7
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Understanding the concept of big bang is not that easy! The whole Cosmos is made up of many universes... every universe consisting of many galaxies and Milky Ways and every galaxy consisting of millions of stars and our solar system... the sun being a small star.
The mother of all explosions... the big bang concept can only be understood by one who travels the spiritual path. If we try to understand the system of God Almighty and the world of souls' atmans in the Cosmos... everything becomes clear! Imagine a situation when the old cosmos is about to dissolve. The moment the complete dissolution of the Cosmos occurs... every single soul atman in the Cosmos regains its original pure pristine form by reaching the 8.4 millionth manifestation... the last leg in the cosmic life cycle!
This cluster of all purified souls atmans in the Cosmos... the size of half a thumb (this aspect of cosmic life has been made explicitly clear in the Sacred Bhagavad Gita... the doctrine given to mankind by Lord Krishna in Mahabharata) unable to contain itself for long in the prime pure state again explodes with a big bang. Imagine the size of the whole Cosmos reducing to the size of half a thumb!
This big bang announces the start of a new cosmic journey... a new cosmic life cycle altogether! To comprehend the big bang explosion is beyond the limited faculties of human beings. The cosmic explosion is much beyond the capture of the five senses and the mind. After the occurrence of the big bang... all souls’ atmans hurtle down the cosmic journey at speeds unimaginable! As the Rolling Ball gathers Moss... these souls atmans also gather impurities on the way.
To regain their pure pristine original form... every soul atman manifests a chain of bodies... a cosmic cycle of 8.4 million manifestations and an earthly domain of 96.4 million years. It is only then human being reaches the stage of enlightenment (kaivalya jnana) and finally salvation (moksha). From the first manifestation as an amoeba (single cell formation), the soul atman evolves into multi-cell formation, insect life, plant life and animal life. Reaching the human form announces the soul atman having covered 7.3 million manifestations. More on Big Bang theory - http://www.godrealized.com/bigbangtheory.html
2007-05-30 18:44:28
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answer #6
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answered by godrealized 6
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"huge Bang" is a coined word initially utilized in mockery of the thought. in many respects it truly is carefully incorrect. the huge Bang replaced into somewhat a surprising expansion of area from some component that we lack the contraptions to discover, because it truly is risk-free from us by skill of the particle horizon wherein rely replaced into first allowed to handle of power. previous to that the universe replaced into opaque, so there are in straight forward terms hypothesis to describe what existed until now then.
2016-10-09 01:05:48
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answer #7
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answered by Anonymous
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Not Correct
2007-05-28 17:39:27
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answer #8
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answered by Anonymous
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Beware statements with " I feel" because these are opinions, and unless your opinion is so contrary to established fact, it is never absolutely wrong, but then it may not be true, either.
2007-05-28 16:59:24
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answer #9
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answered by cattbarf 7
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I always thought that the big bang was a porno
jk
it could be correct or it could be wrong.
after all its all theory and not reality. your guess is as good as anybody's
2007-05-28 17:03:03
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answer #10
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answered by Sexy house music 5
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