Universe Existed Forever?
Few centuries back, mankind believed that Earth is in a motionless state and didn’t believe on the idea of ‘cosmos’. But, our great scientific minds through their scrutinizing observational evidences proposed various theories that helped us to have a better understanding about the universe. However, we still don’t have answers for many burning questions. And, some of us believe that there aren’t enough burning questions asked to understand many aspects about our universe. Of all the questions, humans are very interested in knowing about the origins of the universe. Although, many theories attempted to answer the ‘origin’ inquiry, the most widely accepted theory is ‘Big Bang’.
Einstein’s theory of general relativity predicted that universe came into existence when an infinitely dense single point exploded outwards about 13.8 billion years ago. Before the ‘Big Bang’ everything that exists now in the universe is said to have been compressed into that single point, which is referred as ‘Initial Singularity’. According to this theory, the universe has been exponentially expanding ever since its birth, and will continue to do so until its death. There’s also the ‘big crunch’ theory, which predicts that our universe’s death will be a result of contraction. It states that at some point in the very distant future the universe will return to its original state of singularity. The theory simply implies that universe go through these series of expansions and contractions. It says there is a beginning and an end.
However, a new theory from two researchers – Saurya Das from Canada’s University of Lethbridge and Farag Ali from Egypt’s Benha University – has suggested that ‘big bang’ isn’t the starting point of our universe. Applying new quantum corrections to Einstein’s theory of general relativity, the astrophysicist Saurya Das stated in an interview that “As far as we can see, since different points in the universe never actually converged in the past, it did not have a beginning. It lasted forever. It will also not have an end … In other words, there is no singularity.”
The alternative theory is said to have taken both general relativity and quantum theory into account and also considered both dark matter and dark energy, suggesting that universe is static rather than expanding (an idea introduced by Einstein, a century ago). Nevertheless, the study doesn’t seem to question the occurrence of Big Bang, but only the theory that ‘Big Bang’ caused the universe to originate. Astrophysicist Brian Koberlain emphasized that “By eliminating the singularity, the new model or theory predicts that the universe had no beginning. It existed forever as a kind of quantum potential before collapsing into the hot dense state we call ‘Big Bang’. Unfortunately many confuse ‘no singularity’ with no ‘big bang’. The astrophysicist also explained that the new model doesn’t question the legitimacy of ‘Big Bang’.
Nevertheless, the new proposed theory is very much in the ‘work in progress’ state. Further researches may bring answers and results to problematic questions and may also raise new head-scratching questions.