The universe is made up of stars, planets, moons, asteroids and millions of galaxies. The entire universe is vast and imaginable. It was described as an empty space and this space curves around itself.
There are many theories that explain the beginning of the universe. One of these theories is the Big Bang theory. This theory explains that the universe came from a huge explosion.
It is estimated that about 15 billion years ago, the universe was a giant atom which was tightly pack and eventually exploded. Because of the explosion, the materials that made up the universe came up. The gas and the dust formed in space and eventually condensed into galaxies.
The galaxies were brought currently to its present locations due to the forced of the explosion. The scientist supports this theory with the detection of a certain type of radio waves through out the space. They have said that this particular radio wave can only be produced by a big explosion from the past which they called as the big bang.
Other idea that supports this theory is the observation of the scientist which shows that the galaxies in the universe are still moving outward, such like particles from an explosion.
The Steady State theory is another theory concerning the existence of the universe. The steady state theory state that the universe is not expanding as what the big bang theory tries to explain. This theory believes that the entire universe remains at all time and the same everywhere. It further believes that the universe is in constant size and uniform throughout.
The idea of the steady state theory state that the entire universe undergoes evolutionary processes, in stars and galaxies that will change with age, but not as a whole as the entire universe.
Another theory is the Pulsating theory. This theory believes that the stars as they are constantly gave of heat light and radiation; could be burned-out or will collapse and turn into black holes until such time that the energy in space will fade.
According to the pulsating theory, this will be the cause of the death of the universe. They think that the universe will come to an end in the future but a big bang will start the universe again.
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