Science

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1. 
   gbeatty Teacher
   College - Freshman

   The Big Bang theory is an attempt to deal with the observed reality of an expanding universe. That is to say, in the wake of observations showing that all galaxies are moving away from one another, the "film" was run backward mentally, projecting back to a time when all the matter and energy in the universe was compressed into a single unit. In fact, this was a time before matter and energy had differentiated. This massive block of substance then exploded outward in all direction, differentiating into matter and energy, and into the different nuclear forces. That explosion is the Big Bang.

    

   http://www.big-bang-theory.com/

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   Posted by gbeatty on Monday April 7, 2008 at 6:11 PM
   
   

2. 
   busckeeper0018 Student
   High School - 9th Grade

   In the "beginning" of the Universe, there was no Universe.  All of the matter that we know exists today was compacted into an incredibly small space.  As you know, the greater the amount of mass in a unit of space or point, the denser the object or point is.  This "point" that held all of the matter in the universe was the densest object that we have ever discovered.  Anyway, this point exploded and flung out all of its matter into space.  This is the Big Bang Theory: the theory that a big bang (the explosion) caused the Universe to form.  Edwin Hubble is credited with coming up with this theory.  He observed that all objects in the Universe, especially galaxies, are continually moving away from each other.  He also discovered that a galaxy's velocity is proportional to its distance.  For more information this and the Big Bang Theory in general, take a look at the website that I have provided.

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   http://www.umich.edu/~gs265/bigbang.htm

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   Posted by busckeeper0018 on Saturday July 5, 2008 at 6:54 PM
   
   

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