Updated: Aug 24, 2020
-brought to you by The Spacestellar
" Have you ever wondered, what makes all of us exist today..?? "
" Does this Universe we observe today, was the same all time..?? "
It all began 13.8 billion years ago. The entire universe which spreads billions of light years today, was once a size of electron which exploded to about it's current size within a fraction of second. This came to be famously known as The Big Bang. Even the time did not exist before the big bang. English astronomer Fred Hoyle first coined the term "Big Bang". A Belgian priest George Lemaitre first suggested the Big bang theory in the 1920s. After its initial expansion, the universe cooled sufficiently to allow the formation of subatomic particles, and later atoms. Giant clouds of the primordial elements were formed. These atoms combined to form larger atoms and elements. The earliest of them were hydrogen and helium. The strong forces of gravity led to the formation of gas clouds. Due to the gravity, hydrogen and helium atoms started combining which gave rise to the higher elements. According to the Big Bang theory, the universe at the beginning was very hot and very small, and since then it has been expanding and cooling down. From the day big bang took place, the universe is continuously expanding.
But the question is,
" How valid is this theory..?? "
" How come the scientists are so sure about this theory..?? "
There are many questions which ask the validity of Big bang theory, but many experiments and results obtained synchronizes exactly with what the Big bang theory predicts, thus making it true.