EVER HEARD OF THE BIG BANG?
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The theory developed by astronomers with observations of mathematical models of how the universe came to be. The fundamental precursor of this theory is the Einstein's theory of relativity combined with standard theories of fundamental particles. Today the NASA projects ( HUBBLE AND SPTIZER TELESCOPE) continue to measure the earth's expansion in an attempt to determine whether it would expand forever, or would one day just collapse.
The big bang is not a theory for describing the origin of the universe, rather a theory describing hoe the universe was formed from numerous tiny dense state into what it is today. Another misconception is that the big bang was some kind of explosion. The big bang is actually expansion of space itself.
The galaxies we see today, that seem to be separated by an infinte space was actually all part of a zero volume and infinite density known as singularity.
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According to the theory the universe was initially dense and very hot, it contained a lot of energy that couldn't form matter. The universe the began to expand rapidly, cool down and become less dense theerby forming matter from the singularity that stretched across space.
This theory arose from an initial experimentation with spectroscopes( a device that divides light spectrum into it's component wavelengths) and a discovery of frequency of light wave depending more on the source of the sound. light also travels in waves and this led to a theory that the stars were moving away from the earth and the wavelength of the light emitted stretched.
Astronomer Edwin Hubble also discovered that the velocity of a star appeared to be proportional to its distance from the earth. In other words the farther a star the faster it appeared to move from us leading to the formation of the Hubble's theory(the relationship between a distant celestial body and it's distance from the observer).
One second after the big bang, over a billion neutrons,protons,electrons,anti-electrons,positrons. As time passed the universe cooled and the neutrons either decayed into electrons and protons or combined with protons to make deuterium an isotope of hydrogen. It finally would reach a point where electrons combined with nuclei to form neutral atoms. When free electrons were absorbed from the neutral atoms, the universe became transparent.
the after glow of the big bang theory can still be observed today and it's referred to as COSMIC BACKGROUND THEORY
