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The Big Bang
Beginning of paper
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, theory can best
explain the creation of the universe.
The Bi ....
Middle of paper
....is more reasonable than the Steady State model. First, the redshifts of distant
galaxies. Redshift is a Doppler effect which states that if a galaxy is moving
away, the spectral line of that galaxy observed will have a shift to the red end.
The faster the galaxy moves, the more shift it has. If the galaxy is moving
closer, the spectral line will .... |
| Word count: 1282 |
Page count: 5 |
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