With Big Bang, the universe is accepted to have begun as only a point, and what we see today took billions of years to shape. At the point when the universe started, it was simply little, hot particles blended with light and energy that later expanded after some time. Those particles in the long run assembled together to frame stars and galaxies, and at last shape the universe we know about today.
But what occurred before the Big Bang? As it were, what was around before the universe started? In the fourth season finale of his “StarTalk” TV show, astrophysicist Neil deGrasse Tyson asked prestigious physicist Stephen Hawking a similar inquiry, and his answer was: “Nothing was around before the big, Big Bang.”
Hawking’s answer was based on a proposed hypothesis called the “no-boundary condition.” According to him, “the boundary condition of the universe … is that it has no boundary.” To better understand the hypothesis, we have to go reverse in time.
The universe keeps on expanding and is presently accepted to be around 13.8 billion years of age. But, as we get nearer to the Big Bang, the universe contracts and shrivels down to the span of a solitary molecule, inside which the present laws of material science and time don’t work.
Hawking’s clarification, along these lines, proposes that “the ordinary real time” as we understand it didn’t exist before the Big Bang. While it shrinks endlessly as we get nearer to the start of the universe, it never really achieves a correct beginning stage.
“Since events before the Big Bang have no observational consequences, one may as well cut them out of the theory, and say that time began at the Big Bang,” Hawking wrote in a lecture on the no-boundary condition. “The conclusion of this lecture is that the universe has not existed forever. Rather, the universe, and time itself, had a beginning in the Big Bang.”