The BIG BANG THEORY about the universe is the most widely acceptable theories with regard to the origin of the universe. According to the big bang, the universe was created sometime between 10 billion and 20 billion years ago from a cosmic explosion that hurled matter and in all directions. All the galaxies were formed from this matter. Observations of these galaxies show that they are still moving apart from each other.
The universe is expanding Some scientists have
suggested another theory as "steady theory:" to explain the process of the evolution of the universe. However the general notion on which all scientists agree is the theory of Big Bang. Steady theory is the theory about the universe and the observations by the astronomers have shown that the galaxies are moving away from each other and the universe seems to be expanding. The theory shows that the new matter is always being created to fill the space left by this expansion. The new matter moves apart and forms galaxies which continue to move apart. This means that the universe always look exactly the same. It has no beginning or end but in a steady state. However many observations have suggested that the universe has not always looked like the same.
THE FUTURE OF UNIVERSE
At present the universe is expanding but the astronomers have questioned that whether or not this expansion will continue Certain observations which have been made in this regard is that one possible ending of the universe will be the "big crunch‖. The galaxies and other matter may be moving apart but their motion is restrained by their mutual gravitational attraction. If there is a sufficient matter in the universe gravity will eventually win and begin pulling the galaxies together again causing the universe to experience a reverse of the big bang i.e., the BIG CRUNCH.
However there is a possibility that there is not enough matter in the universe for the big crunch to happen. This means that if it happens then the universe will continue to expand forever.
No comments:
Post a Comment