Big bang Definition and 909 Threads

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")