i 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 still expanding, as astronomers
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 same everywhere on the large scale, at all
times.2 It maintains the same average 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 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...
... up the structure and framework for the "Big Bang" Theory. (Sagan) Edwin Hubble in correlation with the Doppler Effect used the knowledge of the red-shift to prove that the galaxies are moving away from ...
... 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 ...
... all of its themes. The main theory is about 15 billion years ago a great explosion happened and started the beginning of the universe. This explosion is now known today as "The Big Bang." At that point of time all ...
... lot of people believe to be what created this universe is the big bang theory. This scientific hypotheses made by astronomers are called a cosmological model. But through the entire information gather from satellites, scientific data, telescopes, observation evidence, etc ...
... age of the universe upwards. For example, suppose we observe a galactic cluster 13 billion light years away, and receding at a speed of 0.75 times the speed of light. If that object had been created by the Big Bang ...
Identify data sources and gather secondary information to describe the probable origins of the Universe.
... and accepted theory for the origin of the universe is the Big Bang Theory. This theory states that the universe began about 10 billion years ago in a violent explosion; every particle started rushing apart from every other particle ...
... at the Paranal Observatory. The astronomers found that the radiance of the primeval fireball had been warmer in the past. This is exactly what the Big Bang Theory describes. In the end ...
Creation of a Cosmology: Big Bang Theory Chronological history of the events, scientists and their discoveries.
... from the Primordial Fireball, the theory gained momentum until it received a worthy adversarial cosmology known as the Steady State Theory. Fred Hoyle (who despairingly coined the term Big Bang) and his colleagues constructed a model of the universe that ...