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It is always a mystery about how the universe began, whether if and when it will end. Astronomers construct hypotheses called cosmological models that try to find the answer. There are two types of models: Big Bang and Steady State. However, through many observational evidences, the Big Bang theory can best explain the creation of the universe. The Big Bang model postulates that about 15 to 20 billion years ago, the universe violently exploded into being, in an event called the Big Bang. Before the Big Bang, all of the matter and radiation of our present universe were packed together in the primeval fireball--an extremely hot dense state from which the universe rapidly expanded.1 The Big Bang was the start of time and space. The matter and radiation of that early stage rapidly expanded and cooled. Several million years later, it condensed into galaxies. The universe has continued to expand, and the galaxies have continued moving away from each other ever since. Today the universe is...

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Title: Universe
Approximate word count: 1317
Approximate pages: 6 (250 words per double-spaced page)

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1. The Entertainment Universe
   

   The Entertainment Universe. ... In the entertainment universe their is practically
   no law and no limitation. Anything and everything goes. ...

2. The Expandng Universe
   

   the expandng universe. ... Although there is still much controversy over the ultimate
   fate of the universe, the evidence is mounting for the Big Rip theory. ...

3. Universe
   

   Universe. It is always a mystery about how the universe began, whether if
   and when it will end. ... Such a universe is said to be open. ...

4. Universe
   

   Universe. It is always a mystery about how the universe began, whether if
   and when it will end. ... Such a universe is said to be open. ...

5. What Will Happen To The Universe?
   

   What will happen to the universe? Nicole ... others. This theory states that the
   universe will expand to a certain point of the Big Bang. ...