The Big Bang Theory

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It is always a riddle about how the origination began, whether

if and when it will end. Astronomers construct hypotheses called

cosmological models that try to bechance the answer. at that place are two

types of models: adult Bang and rigid secernate. However, through

many empiric evidences, the grand Bang theory give the gate 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 original fireball--an extremely hot dense state from which

the universe quickly expanded.1 The Big Bang was the start of

time and space. The matter and radiation of that former(a)(a) stage

rapidly expanded and cooled. Several million years later, it

condensed into galaxies. The universe has proceed to expand,

and the galaxies have continued pitiful away from each other ever

since. Today the universe is still expanding, as astronomers

have observed.

The Steady State model says that the universe does not

evolve or change in time. There was no beginning in the past,

nor will there be change in the future.



This model assumes the

perfect cosmological principle. This principle says that the

universe is the comparable everywhere on the large scale, at all

times.2 It maintains the same fairish density of matter forever.

There are observational evidences found that can prove the

Big Bang model is more reasonable than the Steady State model.

First, the red raise ups 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...

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