The Unknown Universe(Space series) article -1

The universes SPACE SERIES

How did the universe originated? -IN SPACE

Man has always wondered how the universe originated, A number of theories have been put forward to explain its origin.According to the β€˜Big Bang’ Theory , the Universe is the result of an explosion called Big Bang . This explosion occurred about 14 billion years ago.When the Big Bang happened, it let loose a huge amount of energy . This energy keeps the Universe expanding.This expansion is likely to continue for another 50 billion years.

Some other scientists, who propagate the ‘ Steady State Theory ‘, believe that the Universe has no beginning or end.

What does the Universe consist of?

The universe is so vast that it contains

everything. The Universe consist of all the galaxies, the stars , the Sun , the Earth and everything that exists in limitless space . The size of the Universe is beyond human imagination. It is difficult to describe the universe exactly , because no one knows what it actually consists of .

There may be many distant worlds in the universe about which we know nothing . Even every empty space is a part of the universe, and so are matter , time and energy. It is impossible to imagine the nature and vastness of our universe.

What do we understand about the birth of universe , according to the Big Bang theory?

TheΒ vast universe was once smaller than an atom this tightly packed particle exploded and form it come all the material of which the universe is made .

Once the big bang occurred, the universe begun stretching like the rubber skin of a huge balloon. Space and time begun to expand at an incredible rate .

This phenomenon is called the inflation OF space. At the end of the rapid inflation the universe became cooler , and the particle that make up matter begun to far amount of some of the energy.

The gas and dust formed after the explosion, condensed into galaxies that are speeding away from each other .

Steady state Theory

Although most scientists agree that the universe begun with the Big Bang , there were some who disagreed. The British scientific FREAD HOYLE , HERMANN BONDI, and , THOMAS GOLD . In 1948 , put forward the Steady State Theory

According to this the universe is uniform throughout both time and space , and had no β€˜beginning’ .Since this theory had no answer to many phenomenon found in , the universe it gradually lost its supporters.

β€˜What is light year?’

AΒ light year is nota measure of time . It is the measure of distance, Stars and planets are so far away that if we measure the distance in kilometres the number would be enormous. So, these hugeΒ distances are measured in ‘ light years’.

Light travels at a speed of 2,99,792.458 kilometre per second .So, a light year is the distance traveled by light in one year – 9,460,000,000,000 kilometre . Proxima Centauri , our nearest Star, next two the sun is 4.2 light years away from here .

Q&A

1.How did the universe originated?

ManΒ has always wondered how the universe originated. A number of theories have been put forward to explain its origin.
According to theΒ β€˜Big Bang’ Theory ,
the Universe is the result of an explosion called Big Bang . This explosion occurred about 14 billion years ago .
When the Big Bang happened, it let loose a huge amount of energy . This energy keeps the Universe expanding. This expansion is likely to continue for another 50 billion years.

2.What does the Universe consist of?

TheΒ universe is so vast that it contains
everything. The Universe consist of all the galaxies, the stars , the Sun , the Earth and everything that exists in limitless space . The size of the Universe is beyond human imagination. It is difficult to describe the universe exactly , because no one knows what it actually consists of .

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