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ID number:646981
 
Evaluation:
Published: 10.05.2004.
Language: English
Level: Secondary school
Literature: n/a
References: Not used
Extract

It is always a mystery about how the universe began, whether if and when it will end. Astronomers construct hypotheses calledn 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…

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