I just learnt something really cool about the universe today.
But first some background: I’ve always had a tendency to mock those who put forward the idea of the universe being equivalent to nothing. They like to argue that because they can point out some kind of balance or symmetry in the universe, then that balance or symmetry functions to cancel itself out and therefore renders the universe equivalent to nothingness. For example, all particles have either positive, negative, or neutral charge. The positive cancels the negative (and the neutral neither adds nor substracts anything), and therefore charge doesn’t really exist. Or for another example, all matter and anti-matter cancel, making for nothingness. They then proceed to answer one of the most fundamental questions of all science and philosophy: why is there something and not nothing? Because, they say, there really isn’t something. There’s only ever nothing! Thus, there is no need to explain anything.
I make fun of this generally because I can’t accept it as a satisfactory answer to the questions of why such-and-such phenomenon exist, or why this or that exists. I can’t just chalk up such a profound question as “Where does life come from?” with “Nowhere; It is nothing; Therefore, it doesn’t need to be explained.” Such an answer seems to me to be deeply misguided and based on a deep misunderstanding of the nature of reality.
But now I’m second guessing myself. I have just discovered something amazing about the universe that makes these thinkers seem not such crackpots after all. That discovery is this:
The total amount of matter in the universe is 10^53 Kg.
The total amount of gravitational energy in the universe is -10^53 Kg.
They are perfectly equal but with opposite sign (the gravitational energy is put in terms of kilograms because that is what you get when you convert it from energy to mass using E=mc^2). Therefore, the total amount of mass/energy in the universe sums to zero.
Amazing!
It seems as though nature not only conserves the amount of mass/energy she carries, but conserves it at zero! Everything is equivalent to nothing!
Or is it?
Well, before being too hasty with such a conclusion, I would like to put just this question on the table. I should rather ask, not state: Does this fact entail that everything is equivalent to nothing?
I would like the object of this thread to be a discussion around this question and its potential answers.
To begin with, let me start off by point out this one interesting implication (which may or may not entice the reader in one direction or another): I’ve always admired Einstein for having struck at the mystery of gravity so profoundly as to almost explain it entirely. I say ‘almost’ because his explanation, like most explanations in science or philosophy, only spawns further questions. The central question that general relativity spawns, at least in my mind, is why does the presence of matter result in the curvature of spacetime towards itself?
The interesting implication I want to point out is that now, with this new insight into the nature of the universe, I have an answer to this question: matter curves spacetime towards itself because the presence of matter must be accompanied by a counterbalancing presence of gravitational energy such that the total mass/energy is conserved at zero. So although the presence of matter is the result of something coming from nothing, it is only possible because it comes along with an opposing something (namely gravity) also coming from nothing, and those two elements perfectly balance the universal “check book” at zero.
That’s just so neat and tiday and wrapped up in a little red ribbon.
What’s your thoughts?