In a new episode of Star Talk, the famous British physicist Stephen Hawking spoke with host Neil deGrasse Tyson to talk about what existed before Big Bang, this conceptual line only "visible" by calculation, which is impossible to cross.
Speaking during a TV talk show "Star Talk", aired on National Geographic Channel, Hawking propounded his theory on what happened before the universe came into existence.
"It was always reaching closer to nothing but didn't become nothing", said Hawking. Hawking's work on the origins and structure of the universe, from the Big Bang to black holes, has revolutionized the field, Space.com wrote. The explanations vary from scientist to scientist, but Stephen Hawking has a definite answer - "nothing". In simple terms, the universe is a Euclidean space-time continuum i.e. a closed surface without an end. Hawking further added that the events occurred after the Big Bang have not been clearly defined yet the reason behind this is there is not the proper method to detect those events. But, some scientists and theologists questioned that what was there before the Big Bang.
Furthermore, obviously, the theory itself doesn't successfully clarify where exactly that first dab of the universe originated from in any case, henceforth the brainteaser. According to Hawking, this means that ordinary time is replaced by imaginary time, and this imaginary time "behaves like a fourth direction of space".
"One can regard imaginary and real-time beginning at the South Pole". As per Hawking, a Euclidean approach can only describe the beginning of the universe. "There is nothing south of the South Pole, so there was nothing around before the Big Bang".
It's not an easy concept to take on, but you just have to have faith that space and time didn't exist as we know it on Earth before the Big Bang. According to the theory, the universe began with a small singularity which occurred over 13.8 billion years ago into the universe that is known at present.
He went on: "Jim Hartle and I proposed a "no-boundary condition".