How the Universe was created? When was it created? Who created it? These are some of the fundamental questions which have troubled the intelligent minds from time to time.

Did the God created it? Well, we Physicist have not found that out yet! What we can tell you how or when did it all started or when did the current observable Universe came into existence.

So, what we have here is…….BIG BANG!!! BOOM….

This theory explains how today the universe was born from an extremely warm and dense state about 13.7 trillion years ago. According to this the origin of the universe was from one point.

In 1919, Hubble found out that that the universe is spreading, the galaxies of the universe are rapidly moving away from each other. According to this principle, in the past, galaxies would have been close to each other and, if in the past, they would have been very close to each other. 

From these insights, the Physicists have concluded that the universe originated from a condition in which all matter and energy of the universe was at one single place on very hot temperatures and densities. This condition is called Gravitational Singularity.

 The Big Bang or the great explosion refers to the time instant when the expansion of the observable universe began. This time has been found 13.7 trillion years ago (1.37 x 1010) from today after calculations.