Big bang Definition and 916 Threads

During the last few years I have read a number of books on The Big Bang including recently one By John Gibbin; "In the Beginning." Most if not all of the books mentioned the precision with which the initial values of some important parameters had to be for the universe to have formed as it has...

I've heard rumblings that go against the Big Bang theory but I never read a full blown scientific rebuttal until this: http://www.Newtonphysics.on.ca/BIGBANG/Bigbang.html The article basically shows how all the evidence commonly cited in support of the Big Bang can be explained without...

A quick epistemological issue I'd like to discuss... Can anyone out there give me a good, non-technical explanation for why Cosmologists generally take for granted that evidence of spatial expansion is evidence of some global event (i.e. "the Big Bang"), rather than some local, spatially...

Theoretically, the Universe began at a singualrity at the big bang. Inside of a black hole, there is a singularity. And a black hole eventually evaporates leaving the singularity in an unobservable region of space-time. Couldn't this very well be how our Universe began, and therefore mean that...

to start, i agree with the BB theory as a "result" of the begining, the BB theory does not explain where the energy came from to cause the BB. what is requierd is a theory that predicts where the BB energy originated. the only part of the BB theory i do not agree with is that it created...

Ok apparently I just don't get it, so perhaps someone can explain this to me. Why do we assume that nothing existed before the big bang? Why do we assume that time began with the big bang? DO we have evidence or logic to support this theory? Forgive me if these things are elemetary, but if...

The notion of the big bang is familiar to everybody at PF. The idea has dominated how people think about cosmic history maybe since around 1965 with the detection of the CMB. Widely shared myths or images about beginnings are important parts of culture. If anyone has a link to some online...

Hydrogen and Helium were the main constituents formed soon (thousands of years?) after the big bang. Why did they not burn (as they are flammable), I am sure the universe was hot enough then to ignite it?

What do you guys think existed before the big bang... since it is the leading theory on the birth of the universe.. what do you think existed before?? nothing? and what is the leading theory on what actually caused the big bang to occur??

If one thinks of the Universe as a closed system -- with the conservation of energy firmly in place -- how can there EVER be in the aggregate a "decrease in the system's ability to do work" ...or "a decrease in the energy available" (from Oxford's Dictionary of Science)? Further, if this...

it seems to me that there are many paradigms for the idea of what the first inception of creation was. I have heard of the speed of light being as many as e60 times faster at the big bang, and this is obviously, what we theorize to be the absolute source of all the universe. Well, if a black...

When there is an explosion on Earth the void created is quickly filled with Earth debris. When we view an exploding star there is no debris (understandable) but there is a large bubble with a void in the middle. Why is the universe NOT shaped like a large bubble with a void since the accepted...

What happened before the Big Bang? Was there just matter about or was there a big bang before the big bang?

Ok, I wondered about something... If determinism is true, then information must exist in the universe for all events. Correct? Then, if we look at the Big Bang, where all existence was concentrated in one entity, wouldn't this mean that in this single tiny entity there muct be contained an...

[SOLVED] Reasoning behind the big bang theory Is there are way to qualitativly explain this, or is the math beyond most people? I understand that according to this model, the universe expanded from an unimaginably tiny particle with unimaginable mass desity, and that during the first fraction...

This was in PF version 2. These questions were discussed and will or probably will be discussed in this topic. Did it happen? How did it happen? How can we tell if it did or didn't happen? When did it happen? (and no saying "when the universe was created")