Tuesday, May 25, 2010

Big Bang

Posted by Louisa at 12:19 AM



I often wonder how is our world came, how was universe formed. I'm always amazed at The Solar System, The Milky Way, Black Hole, the celestial objects.

I want to share my knowledge about The Big Bang. It is a theory how our planets came about. After years of research and gathering evidence, scientists came up with the idea: The Big Bang theory.
About 15 billion years ago, a tremendous explosion started the expansion of the universe. This explosion is known as the Big Bang. At the point of this event all of the matter and energy of space was contained at one point. What triggered this explosion is still a question, its completely unknown.This occurance was not a normal explosion. It was rather an event filling all of space with all of the particles of the embryonic universe rushing away from each other. The Big Bang actually consisted of an explosion of space within itself unlike an explosion of a bomb were fragments are thrown outward. The galaxies were not all clumped together, but rather the Big Bang lay the foundations for the universe.
The Big Bang is the cosmological model development of the Universe. It is supported by most comprehensive evidence based on that is supported by the most comprehensive and accurate explanations from scientific evidence and observation. As used by cosmologists, the term Big Bang generally refers to the idea that the Universe has expanded from a primordial hot and dense initial condition at some finite time in the past and continues to expand to this day.
Based on measurements of the expansion using Type Ia supernovae, measurements of temperature fluctuations in the cosmic microwave background, and measurements of the correlation function of galaxies, the Universe has a calculated age of 13.73 ± 0.12 billion years.The agreement of these three independent measurements strongly supports the lambda-CDM model that describes in detail the contents of the Universe.
Based on evidence, Universe was filled homogeneously and isotropically with an incredibly high energy density, huge temperatures and pressures, and was very rapidly expanding and cooling.
Approximately few seconds into the expansion, a phase transition caused a continuous universe expansion. After expansion stopped, the Universe consisted of a quark–gluon plasma, as well as all other elementary particles. Quark–gluon plasma
is a phase of quantum chromodynamics which exists at extremely high temperature and/or density.
The knowledge on how our universe existed is still being discovered. Thanks to COBE and Nasa's telescope.
for extra info, surf on the websites:
-www.big-bang-theory.com/
-channel.nationalgeographic.com/channel/videos/.../The-Big-Bang.html

 

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