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sarah
What are your feelings about the Big Bang, a theory suggested by scientists ?
Feb 22, 2018 10:09 PM
Comments · 5
We just don't know what's was before the big bang because we don't have tools to check it, and there's one of the most beautiful things on science, somtimes we just said "we don't know" and that's fine. It's part of the thing you know what I mean?
February 22, 2018

Well said, Álvaro :-). 知之為如知。不知為不知。是知也。Freely translated: to know when you do know something and when you don't know something, that's wisdom ;-).

The Big Bang itself stands on fairly firm ground, I believe ... it fits the data well and gives a good description of what is currently going on. As to what came before: any theory of the world that assumes a first origin leads to the immediate question: but what came before it? From that point of view, an infinite universe seems much more appealing, aesthetically. Whether it be an infinite series of contractions and expansions or a continuous expansion leading to near nothingness and a renewed expansion ex - quasi - nihilo, from a spontaneous bubble fluctuation?

Perhaps one day we will have a set of equations which will give a hint as to which model is more likely to be true. Radio waves "fell out" of Maxwell's equations before being practically observed, as did other phenomena which were first predicted from the model and later observed in nature. That is the power of mathematical models in physics. Until such day that we have such a comprehensive model, though, we must recognize that we simply do not know (yet). My 5c.

February 23, 2018
I think for now, this theory is perhaps the one which is the most acceptable as you said. But it is clear that it is hard to imagine such violent event, if it is not the beginning of time what was there before then ? hard question. The big bang suggests many questions about time and I'm curious about what people can think about this subject. :)
February 22, 2018
I'm good with it, you know, the Big Bang is not the beginning of time, it's just the first event we can speculate till now (maybe in the future we will see something more), but we have lots of cientifc evidences about that (Hubble effect and cosmic background radiation for eg.), because of it the Big Bang is the most acceptable theory about the begining of life in Earth. But tell me, why you're asking that? I'm quite curious about it XD
Ps.: I'm not an expert about this topic, I'm just a curious guy about science
February 22, 2018
As far as my understanding of the theory goes, asking what's happened before big bang is meaningless. It's not because we do not have tools to check it, but it's because it's literally meaningless to ask such a question. Big Bang is the birth of space-time that agrees with Einstein's field equations in General Relativity and Edward Hubble's observation that our universe is expanding. Asking what happened before Big Bang is like asking what point is on a higher latitude than the north pole on a sphere. It's just meaningless and illogical. However, even though general relativity is indeed beautiful, more or less intuitive, accurate and in accordance with our experimental data, it is not well explained in the framework of quantum mechanics. I believe newer theories such as super-string theory can finally come up with a good model to unify gravity with quantum mechanics and then, probably quantum effects will help us resolve the issue of singularity in GR and find an alternative theory for Big Bang but the problem with those theories is that most of their actual power may remain only theoretical and on paper with no direct ways of proving or disproving them through direct measurements and experiments. Anyway, BBT is our best shot at the moment.
February 23, 2018
sarah
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