The Big Bang Theory
However, there are many misconceptions prevailing about the big bang theory, and there is a wide misunderstanding about the theory. The big bang theory explains how the universe was expanded from a very tiny and dense state into what it is today. And it does not try to illustrate what came before the bang or what initiated such a bang. Moreover, the big bang was not any kind of an explosion, but the expansion of the universe through a rapid expansion, probably faster than the speed of light.
The theory reveals that the big bang is not just a detonation of matter in a vacant space; rather the space was also formed out of the bang taking the matter with it as it expanded (Takashashi). Until the early 20th century, there common belief remained that the universe was fixed in size. It was Einstein who opened up new possibilities of understating the nature of space, time, and gravity by introducing his general relativity theory. Three important observational outcomes that led to the big bang are that the universe used to expand, which means that the galaxies become larger and larger. It helped in forming the idea that everything remained extremely close together before some kind of a bang.
The big bang theory together with the evolution theory explains, as seen in the figure, that the separations between the galaxies became smaller while the density become higher and this process continued until all matter was compacted into an entirely succinct volume of the universe with an incredible density at the moment of the big bang. As Takashashi points out, the time when the big bang took place can be assessed by dividing the distance to a galaxy by its recessional velocity, the result of which shows that the big bang occurred as long as 10-15 billion years ago, a period that amounts three times the age of the Earth.
On analyzing the radioactive dating of uranium isotopes, it is revealed that the oldest isotopes were created about 10 billion years ago through nuclear reactions in supernovae and from the current model of star evolution; and it is evident that the oldest stars in our Galaxy are about 12 billion years old. Thus, these ages are dependable with the age predicted from the observations about the expansion of the universe, the conformity of which proves that the universe really began a finite time ago, enhancing a good reason to believe in the big bang model of the universe.
The Big Bang theory is not the only model consistent with evidences. George F. R. Ellis, an internationally distinguished astrophysicist comments that the prime consideration behind the construction of various range of models are to explain the observations to the people, like that of Physicist Robert Gentry, the theory of attractive alternative to the standard theory which claims that the big bang theory was inconsistent with the empirical data, bringing his model on Einstein’s static-space-time paradigm which he claims is the “genuine cosmic Rosetta” (The Big Bang Theory).
Big Bang Theory – The Premise. All About Science. Web 17 Nov 2011 <http://big-bang-theory.com/>
Takahashi, Yuki D. (2000). “Big Bang: How Did the Universe Begin?” Web 17 Nov 2011 <http://www.ugcs.caltech.edu/~yukimoon/BigBang/BigBang.htm>